Compare 83 vs 91
| Property | 83 | 91 |
|---|---|---|
| Type | prime | semiprime |
| Unique factors | 1 | 2 |
| Total factors | 1 | 2 |
| Prime factorization | 831 | 71 × 131 |
| Prime factorization | 83 | 7 × 13 |
| Divisors count | 2 | 4 |
| Divisors | 1, 83 | 1, 7, 13, 91 |
| Number of properties | 10 | 1 |
| Additive primes | 13th | |
| Chen primes | 19th | |
| Cousin primes (2nd member) | 8th | |
| Isolated primes | 8th | |
| Left-truncatable primes | 14th | |
| Primes | 23rd | |
| Safe primes | 7th | |
| Semiprimes | 31st | |
| Sexy primes (1st member) | 15th | |
| Sophie germain primes | 9th | |
| Super primes | 9th | |
| Roman numberals | LXXXIII | XCI |
| Base 2 | 10100112 | 10110112 |
| Base 3 | 100023 | 101013 |
| Base 4 | 11034 | 11234 |
| Base 5 | 3135 | 3315 |
| Base 6 | 2156 | 2316 |
| Base 7 | 1467 | 1607 |
| Base 8 | 1238 | 1338 |
| Base 9 | 1029 | 1119 |
| Base 10 | 8310 | 9110 |
| Base 11 | 7611 | 8311 |
| Base 12 | 6b12 | 7712 |
| Base 13 | 6513 | 7013 |
| Base 14 | 5d14 | 6714 |
| Base 15 | 5815 | 6115 |
| Base 16 | 5316 | 5b16 |