Names of 81987
| Nominal | 81987 |
| Cardinal | eighty-one thousand nine hundred eighty-seven |
| Ordinal | 81,987th |
| This number as US currency | eighty-one thousand nine hundred eighty-seven dollars |
| Is 81987 an odd number? | 81987 is an odd number |
| Is 81987 an even number? | 81987 is NOT an even number |
| Is 81987 a palindrome? | 81987 is NOT a palindrome number |
| Is 81987 a triangle number? | 81987 is NOT a triangle number |
81987 in other Bases
| Base 2 (Binary) | 101000000010000112 |
| Base 3 (Ternary) | 110111101203 |
| Base 4 (Quaternary) | 1100010034 |
| Base 5 (Quinary) | 101104225 |
| Base 6 (Senary) | 14313236 |
| Base 8 (Octal) | 2401038 |
| Base 12 (Duodecimal) | 3B54312 |
| Base 16 (Hexadecimal) | 1404316 |
| Base 20 (Vigesimal) | A4J720 |
Primes and Factors tests for 81987
| Is 81987 a Prime Number? | 81987 is NOT a prime |
| Is 81987 a perfect number? | 81987 is NOT a perfect number |
| Is 81987 a Mersenne Prime? | 81987 is NOT a Mersenne prime |
| Is 81987 a Fermat Prime? | 81987 is NOT a Fermat prime |
| Is 81987 a Fibonacci Prime? | 81987 is NOT a Fibonacci prime |
| Is 81987 a Partition Prime? | 81987 is NOT a Partition prime |
| Is 81987 a Pell Prime? | 81987 is NOT a Pell prime |
| Prime Factors | Prime factors of 81987 |
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81987 in other Numerals
| 81987 in Roman Numeral | LXXXMCMLXXXVII |
| 81987 in Chinese Numeral | 捌萬壹仟玖佰捌拾柒 |
| 81987 in Egyptian Numeral | 𓂴𓆼𓍪𓎍𓐀 |
| 81987 in Babylonian Numeral |    |
Roots and stuff for 81987
| Is 81987 a square number? | 81987 is NOT a square number |
| Is 81987 a cube number? | 81987 is NOT a cube number |
| Square root of the number 81987 | 286.33372138119 |
| Cube root of the number 81987 | 43.442518872149 |
Recreational math for 81987
| Number 81987 reversed | 78918 |
| Sum of the digits | 33 |
| No of digits | 5 |