Compare 1983 vs 1987
| Property | 1983 | 1987 |
|---|---|---|
| Type | semiprime | prime |
| Unique factors | 2 | 1 |
| Total factors | 2 | 1 |
| Prime factorization | 31 × 6611 | 19871 |
| Prime factorization | 3 × 661 | 1987 |
| Divisors count | 4 | 2 |
| Divisors | 1, 3, 661, 1983 | 1, 1987 |
| Number of properties | 1 | 6 |
| Good primes | 62nd | |
| Isolated primes | 181st | |
| Lucky primes | 70th | |
| Primes | 300th | |
| Semiprimes | 574th | |
| Sexy primes (1st member) | 127th | |
| Sexy prime triplets (1st member) | 50th | |
| Roman numberals | MCMLXXXIII | MCMLXXXVII |
| Base 2 | 111101111112 | 111110000112 |
| Base 3 | 22011103 | 22011213 |
| Base 4 | 1323334 | 1330034 |
| Base 5 | 304135 | 304225 |
| Base 6 | 131036 | 131116 |
| Base 7 | 55327 | 55367 |
| Base 8 | 36778 | 37038 |
| Base 9 | 26439 | 26479 |
| Base 10 | 198310 | 198710 |
| Base 11 | 154311 | 154711 |
| Base 12 | 119312 | 119712 |
| Base 13 | b9713 | b9b13 |
| Base 14 | a1914 | a1d14 |
| Base 15 | 8c315 | 8c715 |
| Base 16 | 7bf16 | 7c316 |