Names of 7981
| Nominal | 7981 |
| Cardinal | seven thousand nine hundred eighty-one |
| Ordinal | 7,981st |
| This number as US currency | seven thousand nine hundred eighty-one dollars |
| Is 7981 an odd number? | 7981 is an odd number |
| Is 7981 an even number? | 7981 is NOT an even number |
| Is 7981 a palindrome? | 7981 is NOT a palindrome number |
| Is 7981 a triangle number? | 7981 is NOT a triangle number |
7981 in other Bases
| Base 2 (Binary) | 11111001011012 |
| Base 3 (Ternary) | 1012211213 |
| Base 4 (Quaternary) | 13302314 |
| Base 5 (Quinary) | 2234115 |
| Base 6 (Senary) | 1005416 |
| Base 8 (Octal) | 174558 |
| Base 12 (Duodecimal) | 475112 |
| Base 16 (Hexadecimal) | 1F2D16 |
| Base 20 (Vigesimal) | JJ120 |
Primes and Factors tests for 7981
| Is 7981 a Prime Number? | 7981 is NOT a prime |
| Is 7981 a perfect number? | 7981 is NOT a perfect number |
| Is 7981 a Mersenne Prime? | 7981 is NOT a Mersenne prime |
| Is 7981 a Fermat Prime? | 7981 is NOT a Fermat prime |
| Is 7981 a Fibonacci Prime? | 7981 is NOT a Fibonacci prime |
| Is 7981 a Partition Prime? | 7981 is NOT a Partition prime |
| Is 7981 a Pell Prime? | 7981 is NOT a Pell prime |
| Prime Factors | Prime factors of 7981 |
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7981 in other Numerals
| 7981 in Roman Numeral | VMMCMLXXXI |
| 7981 in Chinese Numeral | 柒仟玖佰捌拾壹 |
| 7981 in Egyptian Numeral | 𓇂𓍪𓎍𓏺 |
| 7981 in Babylonian Numeral |    |
Roots and stuff for 7981
| Is 7981 a square number? | 7981 is NOT a square number |
| Is 7981 a cube number? | 7981 is NOT a cube number |
| Square root of the number 7981 | 89.336442731956 |
| Cube root of the number 7981 | 19.984154115379 |
Recreational math for 7981
| Number 7981 reversed | 1897 |
| Sum of the digits | 25 |
| No of digits | 4 |