Names of 16991
| Nominal | 16991 |
| Cardinal | sixteen thousand nine hundred ninety-one |
| Ordinal | 16,991st |
| This number as US currency | sixteen thousand nine hundred ninety-one dollars |
| Is 16991 an odd number? | 16991 is an odd number |
| Is 16991 an even number? | 16991 is NOT an even number |
| Is 16991 a palindrome? | 16991 is NOT a palindrome number |
| Is 16991 a triangle number? | 16991 is NOT a triangle number |
16991 in other Bases
| Base 2 (Binary) | 1000010010111112 |
| Base 3 (Ternary) | 2120220223 |
| Base 4 (Quaternary) | 100211334 |
| Base 5 (Quinary) | 10204315 |
| Base 6 (Senary) | 2103556 |
| Base 8 (Octal) | 411378 |
| Base 12 (Duodecimal) | 99BB12 |
| Base 16 (Hexadecimal) | 425F16 |
| Base 20 (Vigesimal) | 229B20 |
Primes and Factors tests for 16991
| Is 16991 a Prime Number? | 16991 is NOT a prime |
| Is 16991 a perfect number? | 16991 is NOT a perfect number |
| Is 16991 a Mersenne Prime? | 16991 is NOT a Mersenne prime |
| Is 16991 a Fermat Prime? | 16991 is NOT a Fermat prime |
| Is 16991 a Fibonacci Prime? | 16991 is NOT a Fibonacci prime |
| Is 16991 a Partition Prime? | 16991 is NOT a Partition prime |
| Is 16991 a Pell Prime? | 16991 is NOT a Pell prime |
| Prime Factors | Prime factors of 16991 |
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16991 in other Numerals
| 16991 in Roman Numeral | XVMCMXCI |
| 16991 in Chinese Numeral | 壹萬陸仟玖佰玖拾壹 |
| 16991 in Egyptian Numeral | 𓂭𓇁𓍪𓎎𓏺 |
| 16991 in Babylonian Numeral |    |
Roots and stuff for 16991
| Is 16991 a square number? | 16991 is NOT a square number |
| Is 16991 a cube number? | 16991 is NOT a cube number |
| Square root of the number 16991 | 130.34953011039 |
| Cube root of the number 16991 | 25.708277549853 |
Recreational math for 16991
| Number 16991 reversed | 19961 |
| Sum of the digits | 26 |
| No of digits | 5 |