Compare 1986 vs 1987
| Property | 1986 | 1987 |
|---|---|---|
| Type | composite number | prime |
| Unique factors | 3 | 1 |
| Total factors | 3 | 1 |
| Prime factorization | 21 × 31 × 3311 | 19871 |
| Prime factorization | 2 × 3 × 331 | 1987 |
| Divisors count | 8 | 2 |
| Divisors | 1, 2, 3, 6, 331, 662, 993, 1986 | 1, 1987 |
| Number of properties | 0 | 6 |
| Good primes | 62nd | |
| Isolated primes | 181st | |
| Lucky primes | 70th | |
| Primes | 300th | |
| Sexy primes (1st member) | 127th | |
| Sexy prime triplets (1st member) | 50th | |
| Roman numberals | MCMLXXXVI | MCMLXXXVII |
| Base 2 | 111110000102 | 111110000112 |
| Base 3 | 22011203 | 22011213 |
| Base 4 | 1330024 | 1330034 |
| Base 5 | 304215 | 304225 |
| Base 6 | 131106 | 131116 |
| Base 7 | 55357 | 55367 |
| Base 8 | 37028 | 37038 |
| Base 9 | 26469 | 26479 |
| Base 10 | 198610 | 198710 |
| Base 11 | 154611 | 154711 |
| Base 12 | 119612 | 119712 |
| Base 13 | b9a13 | b9b13 |
| Base 14 | a1c14 | a1d14 |
| Base 15 | 8c615 | 8c715 |
| Base 16 | 7c216 | 7c316 |