Compare 1987 vs 1998
| Property | 1987 | 1998 |
|---|---|---|
| Type | prime | composite number |
| Unique factors | 1 | 3 |
| Total factors | 1 | 5 |
| Prime factorization | 19871 | 21 × 33 × 371 |
| Prime factorization | 1987 | 2 × 3 × 3 × 3 × 37 |
| Divisors count | 2 | 16 |
| Divisors | 1, 1987 | 1, 2, 3, 6, 9, 18, 27, 37, 54, 74, 111, 222, 333, 666, 999, 1998 |
| Number of properties | 6 | 0 |
| Good primes | 62nd | |
| Isolated primes | 181st | |
| Lucky primes | 70th | |
| Primes | 300th | |
| Sexy primes (1st member) | 127th | |
| Sexy prime triplets (1st member) | 50th | |
| Roman numberals | MCMLXXXVII | MCMXCVIII |
| Base 2 | 111110000112 | 111110011102 |
| Base 3 | 22011213 | 22020003 |
| Base 4 | 1330034 | 1330324 |
| Base 5 | 304225 | 304435 |
| Base 6 | 131116 | 131306 |
| Base 7 | 55367 | 55537 |
| Base 8 | 37038 | 37168 |
| Base 9 | 26479 | 26609 |
| Base 10 | 198710 | 199810 |
| Base 11 | 154711 | 155711 |
| Base 12 | 119712 | 11a612 |
| Base 13 | b9b13 | ba913 |
| Base 14 | a1d14 | a2a14 |
| Base 15 | 8c715 | 8d315 |
| Base 16 | 7c316 | 7ce16 |