91
Number 91 (ninety-one) is an odd two-digits composite number and natural number following 90 and preceding 92.
| Nominal | 91 |
| Cardinal | ninety-one |
| Ordinal | 91st |
| Number of digits | 2 |
| Sum of digits | 10 |
| Product of digits | 9 |
| Number parity | Odd |
Calculation was done in 0.0000348091 seconds
| Prime factorization | 7 x 13 |
| Prime factors | 7, 13 |
| Number of distinct prime factors ω(n) | 2 |
| Total number of prime factors Ω(n) | 2 |
| Sum of prime factors | 20 |
| Product of prime factors | 91 |
Calculation was done in 0.0000100136 seconds
| List of proper divisors | 1, 7, 13 |
| List of all dividers | 1, 7, 13, 91 |
| Number of divisors d(n) | 4 |
| Sum of all divisors σ(n) | 112 |
| Aliquot sum | 21 |
| 91 is a deficient number , since it is larger than the sum of its proper divisors (21). Its deficiency is 70. |
Calculation was done in 0.0000219345 seconds
| Is 91 a prime number? | No |
| Is 91 a semiprime number? | Yes |
| Is 91 a Chen prime number? | No |
| Is 91 a Mersenne prime number? | No |
Calculation was done in 0.0000159740 seconds
| Is 91 a Catalan number? | No |
| Is 91 a Fibonacci number? | No |
| Is 91 a Idoneal number? | No |
Calculation was done in 0.0000040531 seconds
| 91 is a Happy number |
| 91 is not a Humble number |
| 91 is not a Münchhausen number |
| 91 is not a Perfect number |
| 91 is not a Perfect square |
| 91 is not a Palindrome |
Calculation was done in 0.0020699501 seconds
| Base | System | Value |
|---|
| 2 | Binary | 10110112 |
| 3 | Ternary | 101013 |
| 4 | Quaternary | 11234 |
| 5 | Quinary | 3315 |
| 6 | Senary | 2316 |
| 7 | Septenary | 1607 |
| 8 | Octal | 1338 |
| 9 | Nonary | 1119 |
| 10 | Decimal | 91 |
| 12 | Duodecimal | 7712 |
| 16 | Hexadecimal | 5b16 |
| 20 | Vigesimal | 4b20 |
| 36 | Base36 | 2j36 |
| 60 | Sexagesimal | 1V60 |
Calculation was done in 0.0000231266 seconds
| Square of 91 (n2) | 8281 |
| Cube of 91 (n3) | 753571 |
| Square root of 91 | 9.5393920141695 |
| Natural Logarithm (ln) of 91 | 4.5108595065168 |
| Decimal Logarithm (log) of 91 | 1.9590413923211 |
Calculation was done in 0.0000059605 seconds
| Sine of 91 | 0.10598751175116 |
| Cosecant of 91 | 9.4350738448116 |
| Cosine of 91 | -0.9943674609282 |
| Secant of 91 | -1.0056644442755 |
| Tangent of 91 | -0.10658787210537 |
| Cotangent of 91 | -9.3819304227354 |
Calculation was done in 0.0000119209 seconds
Is 91 an Odd Number?
Yes, the number 91 is an odd number.
Total number of all odd numbers from 1 to 91 is
46Sum of all the odd numbers from 1 to 91 are
2116The sum of all odd numbers is a perfect square: 2116 = 46
An odd number is any integer (a whole number) that cannot be divided by 2 evenly. Odd numbers are the opposite of even numbers.Previous odd number is
89
Calculation was done in 0.0000071526 seconds
| The spelling of 91 in words is "ninety-one", meaning that: |
| 91 is an aban number (a number without the letter a) |
| 91 is not an eban number (as it contains the letter e) |
| 91 is not an iban number (as it contains the letter i) |
| 91 is not an oban number (as it contains the letter o) |
| 91 is not a tban number (as it contains the letter t) |
| 91 is an uban number (a number without the letter u) |
Calculation was done in 0.0000019073 seconds
| Bengali numerals | ৯১ |
| Eastern Arabic numerals | ٩١ |
| Hieroglyphs numeralsused in Ancient Egypt | 𓎎𓏺 |
| Khmer numerals | ៩១ |
| Japanese numerals | 九十一 |
| Roman numerals | XCI |
| Thai numerals | ๙๑ |
Calculation was done in 0.0000660419 seconds
| Arabic | واحد و تسعون |
| Croatian | devedeset i jedan |
| Czech | devadesát jeden |
| Danish | en og halvfems |
| Dutch | éénennegentig |
| Estonian | blaasieke vɔ ɖekɛ |
| Faroese | nítiein |
| Filipino | siyám na pû’t isá |
| Finnish | yhdeksänkymmentäyksi |
| French | quatre-vingt-onze |
| Greek | εννενήντα ένα |
| German | einundneunzig |
| Hebrew | תשעים ואחת |
| Hindi | इक्यानबे |
| Hungarian | kilencvenegy |
| Icelandic | níutíu og einn |
| Indonesian | sembilan puluh satu |
| Italian | novantuno |
| Japanese | 九十一 |
| Korean | 구십일 |
| Latvian | deviņdesmit viens |
| Lithuanian | devyniasdešimt vienas |
| Norwegian | nittién |
| Persian | نود و یک |
| Polish | dziewięćdziesiąt jeden |
| Portuguese | noventa e um |
| Romanian | nouăzeci şi unu |
| Russian | девяносто один |
| Serbian | деведесет и један |
| Slovak | deväťdesiatjeden |
| Slovene | devetdeset ena |
| Spanish | noventa y uno |
| Swahili | tisini na moja |
| Swedish | nittioen |
| Thai | เก้าสิบเอ็ด |
| Turkish | doksan bir |
| Ukrainian | девʼяносто один |
| Vietnamese | chín mươi mốt |
Calculation was done in 0.0199949741 seconds
| Number 91 reversed | 19 |
| ASCII Code | 91 | [ |
| Unicode Character | U+005B | [ |
| Unix Timestamp | Thu, 01 Jan 1970 00:01:31 +0000 |
Calculation was done in 0.0000379086 seconds
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