Compare 1591 vs 1597
| Property | 1591 | 1597 |
|---|---|---|
| Type | semiprime | prime |
| Unique factors | 2 | 1 |
| Total factors | 2 | 1 |
| Prime factorization | 371 × 431 | 15971 |
| Prime factorization | 37 × 43 | 1597 |
| Divisors count | 4 | 2 |
| Divisors | 1, 37, 43, 1591 | 1, 1597 |
| Number of properties | 1 | 9 |
| Cousin primes (1st member) | 57th | |
| Emirps | 77th | |
| Fibonacci primes | 7th | |
| Good primes | 56th | |
| Isolated primes | 152nd | |
| Lucky primes | 61st | |
| Primes | 251st | |
| Pythagorean primes | 119th | |
| Semiprimes | 461st | |
| Super primes | 54th | |
| Roman numberals | MDXCI | MDXCVII |
| Base 2 | 110001101112 | 110001111012 |
| Base 3 | 20112213 | 20120113 |
| Base 4 | 1203134 | 1203314 |
| Base 5 | 223315 | 223425 |
| Base 6 | 112116 | 112216 |
| Base 7 | 44327 | 44417 |
| Base 8 | 30678 | 30758 |
| Base 9 | 21579 | 21649 |
| Base 10 | 159110 | 159710 |
| Base 11 | 121711 | 122211 |
| Base 12 | b0712 | b1112 |
| Base 13 | 95513 | 95b13 |
| Base 14 | 81914 | 82114 |
| Base 15 | 71115 | 71715 |
| Base 16 | 63716 | 63d16 |