| Nominal | 5991 |
| Cardinal | five thousand nine hundred ninety-one |
Cardinal five thousand nine hundred ninety-one | |
| Ordinal | 5,991st |
| Number of digits | 4 |
| Sum of digits | 24 |
| Product of digits | 405 |
| Number parity | Odd |
| Prime factorization | 3 x 1997 |
| Prime factors | 3, 1997 |
| Number of distinct prime factors ω(n) | 2 |
| Total number of prime factors Ω(n) | 2 |
| Sum of prime factors | 2000 |
| Product of prime factors | 5991 |
| Is 5991 a prime number? | No |
| Is 5991 a semiprime number? | Yes |
| Is 5991 a Chen prime number? | No |
| Is 5991 a Mersenne prime number? | No |
| Is 5991 a Catalan number? | No |
| Is 5991 a Fibonacci number? | No |
| Is 5991 a Idoneal number? | No |
| Square of 5991 (n2) | 35892081 |
| Cube of 5991 (n3) | 215029457271 |
| Square root of 5991 | 77.401550372069 |
| Natural Logarithm (ln) of 5991 | 8.6980136220839 |
| Decimal Logarithm (log) of 5991 | 3.7774993195904 |
| Sine of 5991 | 0.017189549093418 |
| Cosecant of 5991 | 58.17488257344 |
| Cosine of 5991 | -0.99985224878577 |
| Secant of 5991 | -1.0001477730479 |
| Tangent of 5991 | -0.01719208924548 |
| Cotangent of 5991 | -58.166287163902 |
| The spelling of 5991 in words is "five thousand nine hundred ninety-one", meaning that: |
| 5991 is not an aban number (as it contains the letter a) |
| 5991 is not an eban number (as it contains the letter e) |
| 5991 is not an iban number (as it contains the letter i) |
| 5991 is not an oban number (as it contains the letter o) |
| 5991 is not a tban number (as it contains the letter t) |
| 5991 is not an uban number (as it contains the letter u) |
| Bengali numerals | ৫৯৯১ |
| Eastern Arabic numerals | ٥٬٩٩١ |
| Hieroglyphs numeralsused in Ancient Egypt | 𓆼𓆼𓆼𓆼𓆼𓍪𓎎𓏺 |
| Khmer numerals | ៥៩៩១ |
| Japanese numerals | 五千九百九十一 |
| Roman numerals | n/a |
| Thai numerals | ๕๙๙๑ |
| Arabic | خمسة آلاف و تسعة مائة و واحد و تسعون |
| Croatian | pet tisuća devetsto devedeset i jedan |
| Czech | pět tisíc devět set devadesát jeden |
| Danish | fem tusinde ni hundrede en og halvfems |
| Dutch | vijfduizend negenhonderdéénennegentig |
| Estonian | akpe atɔ̃ alafa asieke blaasieke vɔ ɖekɛ |
| Faroese | fimm tusin og níggjuhundraðognítiein |
| Filipino | limáng libó’t siyám na daán at siyám na pû’t isá |
| Finnish | viisituhattayhdeksänsataayhdeksänkymmentäyksi |
| French | cinq mille neuf cent quatre-vingt-onze |
| Greek | πέντε χίλιάδες εννιακόσια εννενήντα ένα |
| German | fünftausendneunhunderteinundneunzig |
| Hebrew | חמשת אלפים תשע מאות תשעים ואחת |
| Hindi | पाँच हज़ार नौ सौ इक्यानबे |
| Hungarian | ötezerkilencszázkilencvenegy |
| Icelandic | fimm þúsund og níuhundrað og níutíu og einn |
| Indonesian | lima ribu sembilan ratus sembilan puluh satu |
| Italian | cinquemilanovecentonovantuno |
| Japanese | 五千九百九十一 |
| Korean | 오천구백구십일 |
| Latvian | piectūkstoš deviņsimt deviņdesmit viens |
| Lithuanian | penki tūkstančiai devyni šimtai devyniasdešimt vienas |
| Norwegian | fem tusen ni hundre og nittién |
| Persian | پنج هزار و نهصد و نود و یک |
| Polish | pięć tysięcy dziewięćset dziewięćdziesiąt jeden |
| Portuguese | cinco mil novecentos e noventa e um |
| Romanian | cinci mii nouă sute nouăzeci şi unu |
| Russian | пять тысяч девятьсот девяносто один |
| Serbian | пет хиљада деветсто деведесет и један |
| Slovak | päť tisíc deväťsto deväťdesiatjeden |
| Slovene | pet tisuću devetsto devetdeset ena |
| Spanish | cinco mil novecientos noventa y uno |
| Swahili | elfu tano, mia tisa na tisini na moja |
| Swedish | femtusenniohundranittioen |
| Thai | ห้าพันเก้าร้อยเก้าสิบเอ็ด |
| Turkish | beş bin dokuz yüz doksan bir |
| Ukrainian | пʼять тисяч девʼятсот девʼяносто один |
| Vietnamese | năm nghìn chín trăm chín mươi mốt |
| Number 5991 reversed | 1995 | |
| Unicode Character | U+1767 | ᝧ |
| Unix Timestamp | Thu, 01 Jan 1970 01:39:51 +0000 | |