Compare 1987 vs 2161
| Property | 1987 | 2161 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 19871 | 21611 |
| Prime factorization | 1987 | 2161 |
| Divisors count | 2 | 2 |
| Divisors | 1, 1987 | 1, 2161 |
| Number of properties | 6 | 3 |
| Good primes | 62nd | |
| Isolated primes | 181st | 193rd |
| Lucky primes | 70th | |
| Primes | 300th | 326th |
| Pythagorean primes | 159th | |
| Sexy primes (1st member) | 127th | |
| Sexy prime triplets (1st member) | 50th | |
| Roman numberals | MCMLXXXVII | MMCLXI |
| Base 2 | 111110000112 | 1000011100012 |
| Base 3 | 22011213 | 22220013 |
| Base 4 | 1330034 | 2013014 |
| Base 5 | 304225 | 321215 |
| Base 6 | 131116 | 140016 |
| Base 7 | 55367 | 62057 |
| Base 8 | 37038 | 41618 |
| Base 9 | 26479 | 28619 |
| Base 10 | 198710 | 216110 |
| Base 11 | 154711 | 169511 |
| Base 12 | 119712 | 130112 |
| Base 13 | b9b13 | ca313 |
| Base 14 | a1d14 | b0514 |
| Base 15 | 8c715 | 99115 |
| Base 16 | 7c316 | 87116 |