Compare 89 vs 91
| Property | 89 | 91 |
|---|---|---|
| Type | prime | semiprime |
| Unique factors | 1 | 2 |
| Total factors | 1 | 2 |
| Prime factorization | 891 | 71 × 131 |
| Prime factorization | 89 | 7 × 13 |
| Divisors count | 2 | 4 |
| Divisors | 1, 89 | 1, 7, 13, 91 |
| Number of properties | 8 | 1 |
| Additive primes | 14th | |
| Chen primes | 20th | |
| Fibonacci primes | 5th | |
| Isolated primes | 9th | |
| Primes | 24th | |
| Pythagorean primes | 10th | |
| Semiprimes | 31st | |
| Sexy primes (2nd member) | 15th | |
| Sophie germain primes | 10th | |
| Roman numberals | LXXXIX | XCI |
| Base 2 | 10110012 | 10110112 |
| Base 3 | 100223 | 101013 |
| Base 4 | 11214 | 11234 |
| Base 5 | 3245 | 3315 |
| Base 6 | 2256 | 2316 |
| Base 7 | 1557 | 1607 |
| Base 8 | 1318 | 1338 |
| Base 9 | 1089 | 1119 |
| Base 10 | 8910 | 9110 |
| Base 11 | 8111 | 8311 |
| Base 12 | 7512 | 7712 |
| Base 13 | 6b13 | 7013 |
| Base 14 | 6514 | 6714 |
| Base 15 | 5e15 | 6115 |
| Base 16 | 5916 | 5b16 |