91 (number)
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|---|---|---|---|---|
| Cardinal | ninety-one | |||
| Ordinal | 91st (ninety-first) |
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| Factorization | 7 × 13 | |||
| Divisors | 1, 7, 13, 91 | |||
| Roman numeral | XCI | |||
| Binary | 10110112 | |||
| Ternary | 101013 | |||
| Quaternary | 11234 | |||
| Quinary | 3315 | |||
| Senary | 2316 | |||
| Octal | 1338 | |||
| Duodecimal | 7712 | |||
| Hexadecimal | 5B16 | |||
| Vigesimal | 4B20 | |||
| Base 36 | 2J36 | |||
91 (ninety-one) is the natural number following 90 and preceding 92.
91 is:
The decimal equivalent of the fraction 1⁄91 can be obtained by using powers of 9.
In astronomy,
Ninety-one is also:
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