491
Everything about the number 491 — its names, how to write it in other bases and numeral systems, and what makes it interesting mathematically.
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Names of 491
| Nominal | 491 |
| Cardinal | four hundred ninety-one |
| Ordinal | 491st |
| This number as US currency | four hundred ninety-one dollars |
Properties (and some facts) of 491
| Is 491 an odd number? | 491 is an odd number |
| Is 491 an even number? | 491 is not an even number |
| Is 491 a palindrome? | 491 is not a palindrome |
| Is 491 a triangle number? | 491 is not a triangle number |
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491 in other bases
| Base 2 (Binary) | 111101011 |
| Base 3 (Ternary) | 200012 |
| Base 4 (Quaternary) | 13223 |
| Base 5 (Quinary) | 3431 |
| Base 6 (Senary) | 2135 |
| Base 8 (Octal) | 753 |
| Base 12 (Duodecimal) | 34B |
| Base 16 (Hexadecimal) | 1EB |
| Base 20 (Vigesimal) | 14B |
Primes and factors tests for 491
| Is 491 a prime number? | 491 is a prime number |
| Is 491 a perfect number? | 491 is not a perfect number |
| Is 491 a Mersenne prime? | 491 is not a Mersenne prime |
| Is 491 a Fermat prime? | 491 is not a Fermat prime |
| Is 491 a Fibonacci prime? | 491 is not a Fibonacci prime |
| Is 491 a partition prime? | 491 is not a partition prime |
| Is 491 a Pell prime? | 491 is not a Pell prime |
| Prime Factors | Prime factors of 491 |
491 in other numeral systems
| 491 in Roman numerals | CDXCI |
| 491 in Chinese numerals | 肆佰玖拾壹 |
| 491 in Babylonian numerals |   |
| 491 in Egyptian numerals | 𓍥𓎎𓏺 |
Roots and squares for 491
| Is 491 a square number? | 491 is not a square number |
| Is 491 a cube number? | 491 is not a cube number |
| Square root of 491 | 22.15851980616 |
| Cube root of 491 | 7.8890946040238 |
Recreational math for 491
| Number 491 reversed | 194 |
| Sum of the digits | 14 |
| Number of digits | 3 |
Arithmetic tables for 491
Other pages about 491
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