Names of 80991
| Nominal | 80991 |
| Cardinal | eighty thousand nine hundred ninety-one |
| Ordinal | 80,991st |
| This number as US currency | eighty thousand nine hundred ninety-one dollars |
| Is 80991 an odd number? | 80991 is an odd number |
| Is 80991 an even number? | 80991 is NOT an even number |
| Is 80991 a palindrome? | 80991 is NOT a palindrome number |
| Is 80991 a triangle number? | 80991 is NOT a triangle number |
80991 in other Bases
| Base 2 (Binary) | 100111100010111112 |
| Base 3 (Ternary) | 110100022003 |
| Base 4 (Quaternary) | 1033011334 |
| Base 5 (Quinary) | 100424315 |
| Base 6 (Senary) | 14225436 |
| Base 8 (Octal) | 2361378 |
| Base 12 (Duodecimal) | 3AA5312 |
| Base 16 (Hexadecimal) | 13C5F16 |
| Base 20 (Vigesimal) | A29B20 |
Primes and Factors tests for 80991
| Is 80991 a Prime Number? | 80991 is NOT a prime |
| Is 80991 a perfect number? | 80991 is NOT a perfect number |
| Is 80991 a Mersenne Prime? | 80991 is NOT a Mersenne prime |
| Is 80991 a Fermat Prime? | 80991 is NOT a Fermat prime |
| Is 80991 a Fibonacci Prime? | 80991 is NOT a Fibonacci prime |
| Is 80991 a Partition Prime? | 80991 is NOT a Partition prime |
| Is 80991 a Pell Prime? | 80991 is NOT a Pell prime |
| Prime Factors | Prime factors of 80991 |
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80991 in other Numerals
| 80991 in Roman Numeral | LXXXCMXCI |
| 80991 in Chinese Numeral | 捌萬玖佰玖拾壹 |
| 80991 in Egyptian Numeral | 𓂴𓍪𓎎𓏺 |
| 80991 in Babylonian Numeral |    |
Roots and stuff for 80991
| Is 80991 a square number? | 80991 is NOT a square number |
| Is 80991 a cube number? | 80991 is NOT a cube number |
| Square root of the number 80991 | 284.58917758762 |
| Cube root of the number 80991 | 43.265884550344 |
Recreational math for 80991
| Number 80991 reversed | 19908 |
| Sum of the digits | 27 |
| No of digits | 5 |