Names of 81997
| Nominal | 81997 |
| Cardinal | eighty-one thousand nine hundred ninety-seven |
| Ordinal | 81,997th |
| This number as US currency | eighty-one thousand nine hundred ninety-seven dollars |
| Is 81997 an odd number? | 81997 is an odd number |
| Is 81997 an even number? | 81997 is NOT an even number |
| Is 81997 a palindrome? | 81997 is NOT a palindrome number |
| Is 81997 a triangle number? | 81997 is NOT a triangle number |
81997 in other Bases
| Base 2 (Binary) | 101000000010011012 |
| Base 3 (Ternary) | 110111102213 |
| Base 4 (Quaternary) | 1100010314 |
| Base 5 (Quinary) | 101104425 |
| Base 6 (Senary) | 14313416 |
| Base 8 (Octal) | 2401158 |
| Base 12 (Duodecimal) | 3B55112 |
| Base 16 (Hexadecimal) | 1404D16 |
| Base 20 (Vigesimal) | A4JH20 |
Primes and Factors tests for 81997
| Is 81997 a Prime Number? | 81997 is NOT a prime |
| Is 81997 a perfect number? | 81997 is NOT a perfect number |
| Is 81997 a Mersenne Prime? | 81997 is NOT a Mersenne prime |
| Is 81997 a Fermat Prime? | 81997 is NOT a Fermat prime |
| Is 81997 a Fibonacci Prime? | 81997 is NOT a Fibonacci prime |
| Is 81997 a Partition Prime? | 81997 is NOT a Partition prime |
| Is 81997 a Pell Prime? | 81997 is NOT a Pell prime |
| Prime Factors | Prime factors of 81997 |
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81997 in other Numerals
| 81997 in Roman Numeral | LXXXMCMXCVII |
| 81997 in Chinese Numeral | 捌萬壹仟玖佰玖拾柒 |
| 81997 in Egyptian Numeral | 𓂴𓆼𓍪𓎎𓐀 |
| 81997 in Babylonian Numeral |    |
Roots and stuff for 81997
| Is 81997 a square number? | 81997 is NOT a square number |
| Is 81997 a cube number? | 81997 is NOT a cube number |
| Square root of the number 81997 | 286.3511829904 |
| Cube root of the number 81997 | 43.444285036409 |
Recreational math for 81997
| Number 81997 reversed | 79918 |
| Sum of the digits | 34 |
| No of digits | 5 |