Compare 1987 vs 2557
| Property | 1987 | 2557 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 19871 | 25571 |
| Prime factorization | 1987 | 2557 |
| Divisors count | 2 | 2 |
| Divisors | 1, 1987 | 1, 2557 |
| Number of properties | 6 | 8 |
| Additive primes | 196th | |
| Chen primes | 226th | |
| Good primes | 62nd | |
| Happy primes | 66th | |
| Isolated primes | 181st | 230th |
| Lucky primes | 70th | 81st |
| Primes | 300th | 375th |
| Pythagorean primes | 183rd | |
| Sexy primes (1st member) | 127th | |
| Sexy primes (2nd member) | 153rd | |
| Sexy prime triplets (1st member) | 50th | |
| Roman numberals | MCMLXXXVII | MMDLVII |
| Base 2 | 111110000112 | 1001111111012 |
| Base 3 | 22011213 | 101112013 |
| Base 4 | 1330034 | 2133314 |
| Base 5 | 304225 | 402125 |
| Base 6 | 131116 | 155016 |
| Base 7 | 55367 | 103127 |
| Base 8 | 37038 | 47758 |
| Base 9 | 26479 | 34519 |
| Base 10 | 198710 | 255710 |
| Base 11 | 154711 | 1a1511 |
| Base 12 | 119712 | 159112 |
| Base 13 | b9b13 | 121913 |
| Base 14 | a1d14 | d0914 |
| Base 15 | 8c715 | b5715 |
| Base 16 | 7c316 | 9fd16 |