Names of 138991
| Nominal | 138991 |
| Cardinal | one hundred thirty-eight thousand nine hundred ninety-one |
| Ordinal | 138,991st |
| This number as US currency | one hundred thirty-eight thousand nine hundred ninety-one dollars |
| Is 138991 an odd number? | 138991 is an odd number |
| Is 138991 an even number? | 138991 is NOT an even number |
| Is 138991 a palindrome? | 138991 is NOT a palindrome number |
| Is 138991 a triangle number? | 138991 is NOT a triangle number |
138991 in other Bases
| Base 2 (Binary) | 1000011110111011112 |
| Base 3 (Ternary) | 210011222113 |
| Base 4 (Quaternary) | 2013232334 |
| Base 5 (Quinary) | 134214315 |
| Base 6 (Senary) | 25512516 |
| Base 8 (Octal) | 4173578 |
| Base 12 (Duodecimal) | 6852712 |
| Base 16 (Hexadecimal) | 21EEF16 |
| Base 20 (Vigesimal) | H79B20 |
Primes and Factors tests for 138991
| Is 138991 a Prime Number? | 138991 is NOT a prime |
| Is 138991 a perfect number? | 138991 is NOT a perfect number |
| Is 138991 a Mersenne Prime? | 138991 is NOT a Mersenne prime |
| Is 138991 a Fermat Prime? | 138991 is NOT a Fermat prime |
| Is 138991 a Fibonacci Prime? | 138991 is NOT a Fibonacci prime |
| Is 138991 a Partition Prime? | 138991 is NOT a Partition prime |
| Is 138991 a Pell Prime? | 138991 is NOT a Pell prime |
| Prime Factors | Prime factors of 138991 |
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138991 in other Numerals
| 138991 in Roman Numeral | CXXXVMMMCMXCI |
| 138991 in Chinese Numeral | 壹拾萬叄萬捌仟玖佰玖拾壹 |
| 138991 in Egyptian Numeral | 𓆐𓂯𓇃𓍪𓎎𓏺 |
| 138991 in Babylonian Numeral |    |
Roots and stuff for 138991
| Is 138991 a square number? | 138991 is NOT a square number |
| Is 138991 a cube number? | 138991 is NOT a cube number |
| Square root of the number 138991 | 372.81496751069 |
| Cube root of the number 138991 | 51.799896642161 |
Recreational math for 138991
| Number 138991 reversed | 199831 |
| Sum of the digits | 31 |
| No of digits | 6 |