| Nominal | 4491 |
| Cardinal | four thousand four hundred ninety-one |
Cardinal four thousand four hundred ninety-one | |
| Ordinal | 4,491st |
| Number of digits | 4 |
| Sum of digits | 18 |
| Product of digits | 144 |
| Number parity | Odd |
| Prime factorization | 3 x 3 x 499 |
| Prime factorization in exponent form | 32 x 499 |
| Prime factors | 3, 499 |
| Number of distinct prime factors ω(n) | 2 |
| Total number of prime factors Ω(n) | 3 |
| Sum of prime factors | 502 |
| Product of prime factors | 1497 |
| Is 4491 a prime number? | No |
| Is 4491 a semiprime number? | No |
| Is 4491 a Chen prime number? | No |
| Is 4491 a Mersenne prime number? | No |
| Is 4491 a Catalan number? | No |
| Is 4491 a Fibonacci number? | No |
| Is 4491 a Idoneal number? | No |
| Square of 4491 (n2) | 20169081 |
| Cube of 4491 (n3) | 90579342771 |
| Square root of 4491 | 67.014923711066 |
| Natural Logarithm (ln) of 4491 | 8.4098306730877 |
| Decimal Logarithm (log) of 4491 | 3.6523430550627 |
| Sine of 4491 | -0.99565055361461 |
| Cosecant of 4491 | -1.0043684467101 |
| Cosine of 4491 | 0.093166383888826 |
| Secant of 4491 | 10.733485172005 |
| Tangent of 4491 | -10.686800453721 |
| Cotangent of 4491 | -0.093573376272022 |
| The spelling of 4491 in words is "four thousand four hundred ninety-one", meaning that: |
| 4491 is not an aban number (as it contains the letter a) |
| 4491 is not an eban number (as it contains the letter e) |
| 4491 is not an iban number (as it contains the letter i) |
| 4491 is not an oban number (as it contains the letter o) |
| 4491 is not a tban number (as it contains the letter t) |
| 4491 is not an uban number (as it contains the letter u) |
| Bengali numerals | ৪৪৯১ |
| Eastern Arabic numerals | ٤٬٤٩١ |
| Hieroglyphs numeralsused in Ancient Egypt | 𓆼𓆼𓆼𓆼𓍥𓎎𓏺 |
| Khmer numerals | ៤៤៩១ |
| Japanese numerals | 四千四百九十一 |
| Roman numerals | n/a |
| Thai numerals | ๔๔๙๑ |
| Arabic | أربعة آلاف و أربعة مائة و واحد و تسعون |
| Croatian | četiri tisuće četiristo devedeset i jedan |
| Czech | čtyři tisíce čtyři sta devadesát jeden |
| Danish | fire tusinde fire hundrede en og halvfems |
| Dutch | vierduizend vierhonderdéénennegentig |
| Estonian | akpe ene alafa ene blaasieke vɔ ɖekɛ |
| Faroese | fýre tusin og fýrehundraðognítiein |
| Filipino | ápat na libó’t ápat na daán at siyám na pû’t isá |
| Finnish | neljätuhattaneljäsataayhdeksänkymmentäyksi |
| French | quatre mille quatre cent quatre-vingt-onze |
| Greek | τέσσερις χίλιάδες τετρακόσια εννενήντα ένα |
| German | viertausendvierhunderteinundneunzig |
| Hebrew | ארבעת אלפים ארבע מאות תשעים ואחת |
| Hindi | चार हज़ार चार सौ इक्यानबे |
| Hungarian | négyezernégyszázkilencvenegy |
| Icelandic | fjögur þúsund og fjögurhundrað og níutíu og einn |
| Indonesian | empat ribu empat ratus sembilan puluh satu |
| Italian | quattromilaquattrocentonovantuno |
| Japanese | 四千四百九十一 |
| Korean | 사천사백구십일 |
| Latvian | četrtūkstoš četrsimt deviņdesmit viens |
| Lithuanian | keturi tūkstančiai keturi šimtai devyniasdešimt vienas |
| Norwegian | fire tusen fire hundre og nittién |
| Persian | چهار هزار و چهارصد و نود و یک |
| Polish | cztery tysiące czterysta dziewięćdziesiąt jeden |
| Portuguese | quatro mil quatrocentos e noventa e um |
| Romanian | patru mii patru sute nouăzeci şi unu |
| Russian | четыре тысячи четыреста девяносто один |
| Serbian | четири хиљада четиристо деведесет и један |
| Slovak | štyri tisíc štyristo deväťdesiatjeden |
| Slovene | štiri tisuće štiristo devetdeset ena |
| Spanish | cuatro mil cuatrocientos noventa y uno |
| Swahili | elfu nne, mia nne na tisini na moja |
| Swedish | fyratusenfyrahundranittioen |
| Thai | สี่พันสี่ร้อยเก้าสิบเอ็ด |
| Turkish | dört bin dört yüz doksan bir |
| Ukrainian | чотири тисячі чотириста девʼяносто один |
| Vietnamese | bốn nghìn bốn trăm chín mươi mốt |
| Number 4491 reversed | 1944 | |
| Unicode Character | U+118B | ᆋ |
| Unix Timestamp | Thu, 01 Jan 1970 01:14:51 +0000 | |