Names of 8991
| Nominal | 8991 |
| Cardinal | eight thousand nine hundred ninety-one |
| Ordinal | 8,991st |
| This number as US currency | eight thousand nine hundred ninety-one dollars |
| Is 8991 an odd number? | 8991 is an odd number |
| Is 8991 an even number? | 8991 is NOT an even number |
| Is 8991 a palindrome? | 8991 is NOT a palindrome number |
| Is 8991 a triangle number? | 8991 is NOT a triangle number |
8991 in other Bases
| Base 2 (Binary) | 100011000111112 |
| Base 3 (Ternary) | 1101000003 |
| Base 4 (Quaternary) | 20301334 |
| Base 5 (Quinary) | 2414315 |
| Base 6 (Senary) | 1053436 |
| Base 8 (Octal) | 214378 |
| Base 12 (Duodecimal) | 525312 |
| Base 16 (Hexadecimal) | 231F16 |
| Base 20 (Vigesimal) | 129B20 |
Primes and Factors tests for 8991
| Is 8991 a Prime Number? | 8991 is NOT a prime |
| Is 8991 a perfect number? | 8991 is NOT a perfect number |
| Is 8991 a Mersenne Prime? | 8991 is NOT a Mersenne prime |
| Is 8991 a Fermat Prime? | 8991 is NOT a Fermat prime |
| Is 8991 a Fibonacci Prime? | 8991 is NOT a Fibonacci prime |
| Is 8991 a Partition Prime? | 8991 is NOT a Partition prime |
| Is 8991 a Pell Prime? | 8991 is NOT a Pell prime |
| Prime Factors | Prime factors of 8991 |
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8991 in other Numerals
| 8991 in Roman Numeral | VMMMCMXCI |
| 8991 in Chinese Numeral | 捌仟玖佰玖拾壹 |
| 8991 in Egyptian Numeral | 𓇃𓍪𓎎𓏺 |
| 8991 in Babylonian Numeral |    |
Roots and stuff for 8991
| Is 8991 a square number? | 8991 is NOT a square number |
| Is 8991 a cube number? | 8991 is NOT a cube number |
| Square root of the number 8991 | 94.820883775675 |
| Cube root of the number 8991 | 20.793902305286 |
Recreational math for 8991
| Number 8991 reversed | 1998 |
| Sum of the digits | 27 |
| No of digits | 4 |