| Nominal | 40991 |
| Cardinal | forty thousand nine hundred ninety-one |
Cardinal forty thousand nine hundred ninety-one | |
| Ordinal | 40,991st |
| Number of digits | 5 |
| Sum of digits | 23 |
| Product of digits | 0 |
| Number parity | Odd |
| Prime factorization | 179 x 229 |
| Prime factors | 179, 229 |
| Number of distinct prime factors ω(n) | 2 |
| Total number of prime factors Ω(n) | 2 |
| Sum of prime factors | 408 |
| Product of prime factors | 40991 |
| Is 40991 a prime number? | No |
| Is 40991 a semiprime number? | Yes |
| Is 40991 a Chen prime number? | No |
| Is 40991 a Mersenne prime number? | No |
| Is 40991 a Catalan number? | No |
| Is 40991 a Fibonacci number? | No |
| Is 40991 a Idoneal number? | No |
| Square of 40991 (n2) | 1680262081 |
| Cube of 40991 (n3) | 68875622962271 |
| Square root of 40991 | 202.4623421775 |
| Natural Logarithm (ln) of 40991 | 10.621107809395 |
| Decimal Logarithm (log) of 40991 | 4.6126885133198 |
| Sine of 40991 | -0.48025379755671 |
| Cosecant of 40991 | -2.0822323635701 |
| Cosine of 40991 | 0.87712957419777 |
| Secant of 40991 | 1.1400824113297 |
| Tangent of 40991 | -0.5475289075687 |
| Cotangent of 40991 | -1.826387586439 |
| The spelling of 40991 in words is "forty thousand nine hundred ninety-one", meaning that: |
| 40991 is not an aban number (as it contains the letter a) |
| 40991 is not an eban number (as it contains the letter e) |
| 40991 is not an iban number (as it contains the letter i) |
| 40991 is not an oban number (as it contains the letter o) |
| 40991 is not a tban number (as it contains the letter t) |
| 40991 is not an uban number (as it contains the letter u) |
| Bengali numerals | ৪০৯৯১ |
| Eastern Arabic numerals | ٤٠٬٩٩١ |
| Hieroglyphs numeralsused in Ancient Egypt | 𓂭𓂭𓂭𓂭𓍪𓎎𓏺 |
| Khmer numerals | ៤០៩៩១ |
| Japanese numerals | 四万九百九十一 |
| Roman numerals | n/a |
| Thai numerals | ๔๐๙๙๑ |
| Arabic | أربعون ألف و تسعة مائة و واحد و تسعون |
| Croatian | četrdeset tisuća devetsto devedeset i jedan |
| Czech | čtyřicet tisíc devět set devadesát jeden |
| Danish | fyrre tusinde ni hundrede en og halvfems |
| Dutch | veertigduizend negenhonderdéénennegentig |
| Estonian | akpe blaene alafa asieke blaasieke vɔ ɖekɛ |
| Faroese | fýrati tusin og níggjuhundraðognítiein |
| Filipino | ápat na pû libó’t siyám na daán at siyám na pû’t isá |
| Finnish | neljäkymmentätuhattayhdeksänsataayhdeksänkymmentäyksi |
| French | quarante mille neuf cent quatre-vingt-onze |
| Greek | σαράντα χίλιάδες εννιακόσια εννενήντα ένα |
| German | vierzigtausendneunhunderteinundneunzig |
| Hebrew | ארבעים אלף תשע מאות תשעים ואחת |
| Hindi | चालीस हज़ार नौ सौ इक्यानबे |
| Hungarian | negyvenezerkilencszázkilencvenegy |
| Icelandic | fjörutíu þúsund og níuhundrað og níutíu og einn |
| Indonesian | empat puluh ribu sembilan ratus sembilan puluh satu |
| Italian | quarantamilanovecentonovantuno |
| Japanese | 四万九百九十一 |
| Korean | 사만 구백구십일 |
| Latvian | četrdesmit tūkstoši deviņsimt deviņdesmit viens |
| Lithuanian | keturiasdešimt tūkstančių devyni šimtai devyniasdešimt vienas |
| Norwegian | førti tusen ni hundre og nittién |
| Persian | چهل هزار و نهصد و نود و یک |
| Polish | czterdzieści tysięcy dziewięćset dziewięćdziesiąt jeden |
| Portuguese | quarenta mil novecentos e noventa e um |
| Romanian | patruzeci mii nouă sute nouăzeci şi unu |
| Russian | сорок тысяч девятьсот девяносто один |
| Serbian | четрдесет хиљада деветсто деведесет и један |
| Slovak | štyridsať tisíc deväťsto deväťdesiatjeden |
| Slovene | štirideset tisuću devetsto devetdeset ena |
| Spanish | cuarenta mil novecientos noventa y uno |
| Swahili | elfu arobaini, mia tisa na tisini na moja |
| Swedish | fyrtiotusenniohundranittioen |
| Thai | สี่หมื่นเก้าร้อยเก้าสิบเอ็ด |
| Turkish | kırk bin dokuz yüz doksan bir |
| Ukrainian | сорок тисяч девʼятсот девʼяносто один |
| Vietnamese | bốn mươi nghìn chín trăm chín mươi mốt |
| Number 40991 reversed | 19904 | |
| Unicode Character | U+A01F | ꀟ |
| Unix Timestamp | Thu, 01 Jan 1970 11:23:11 +0000 | |