Compare 1951 vs 1987
| Property | 1951 | 1987 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 19511 | 19871 |
| Prime factorization | 1951 | 1987 |
| Divisors count | 2 | 2 |
| Divisors | 1, 1951 | 1, 1987 |
| Number of properties | 3 | 6 |
| Cuban primes 1 | 14th | |
| Good primes | 62nd | |
| Isolated primes | 181st | |
| Lucky primes | 70th | |
| Primes | 297th | 300th |
| Sexy primes (1st member) | 127th | |
| Sexy prime triplets (1st member) | 50th | |
| Twin primes (2nd member) | 60th | |
| Roman numberals | MCMLI | MCMLXXXVII |
| Base 2 | 111100111112 | 111110000112 |
| Base 3 | 22000213 | 22011213 |
| Base 4 | 1321334 | 1330034 |
| Base 5 | 303015 | 304225 |
| Base 6 | 130116 | 131116 |
| Base 7 | 54557 | 55367 |
| Base 8 | 36378 | 37038 |
| Base 9 | 26079 | 26479 |
| Base 10 | 195110 | 198710 |
| Base 11 | 151411 | 154711 |
| Base 12 | 116712 | 119712 |
| Base 13 | b7113 | b9b13 |
| Base 14 | 9d514 | a1d14 |
| Base 15 | 8a115 | 8c715 |
| Base 16 | 79f16 | 7c316 |