981
Everything about the number 981 — its names, how to write it in other bases and numeral systems, and what makes it interesting mathematically.
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Names of 981
| Nominal | 981 |
| Cardinal | nine hundred eighty-one |
| Ordinal | 981st |
| This number as US currency | nine hundred eighty-one dollars |
Properties (and some facts) of 981
| Is 981 an odd number? | 981 is an odd number |
| Is 981 an even number? | 981 is not an even number |
| Is 981 a palindrome? | 981 is not a palindrome |
| Is 981 a triangle number? | 981 is not a triangle number |
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981 in other bases
| Base 2 (Binary) | 1111010101 |
| Base 3 (Ternary) | 1100100 |
| Base 4 (Quaternary) | 33111 |
| Base 5 (Quinary) | 12411 |
| Base 6 (Senary) | 4313 |
| Base 8 (Octal) | 1725 |
| Base 12 (Duodecimal) | 699 |
| Base 16 (Hexadecimal) | 3D5 |
| Base 20 (Vigesimal) | 291 |
Primes and factors tests for 981
| Is 981 a prime number? | 981 is not a prime number |
| Is 981 a perfect number? | 981 is not a perfect number |
| Is 981 a Mersenne prime? | 981 is not a Mersenne prime |
| Is 981 a Fermat prime? | 981 is not a Fermat prime |
| Is 981 a Fibonacci prime? | 981 is not a Fibonacci prime |
| Is 981 a partition prime? | 981 is not a partition prime |
| Is 981 a Pell prime? | 981 is not a Pell prime |
| Prime Factors | Prime factors of 981 |
981 in other numeral systems
| 981 in Roman numerals | CMLXXXI |
| 981 in Chinese numerals | 玖佰捌拾壹 |
| 981 in Babylonian numerals |   |
| 981 in Egyptian numerals | 𓍪𓎍𓏺 |
Roots and squares for 981
| Is 981 a square number? | 981 is not a square number |
| Is 981 a cube number? | 981 is not a cube number |
| Square root of 981 | 31.320919526732 |
| Cube root of 981 | 9.9362612672164 |
Recreational math for 981
| Number 981 reversed | 189 |
| Sum of the digits | 18 |
| Number of digits | 3 |
Arithmetic tables for 981
Other pages about 981
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