Compare 1997 vs 2687
| Property | 1997 | 2687 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 19971 | 26871 |
| Prime factorization | 1997 | 2687 |
| Divisors count | 2 | 2 |
| Divisors | 1, 1997 | 1, 2687 |
| Number of properties | 10 | 11 |
| Additive primes | 205th | |
| Chen primes | 185th | 234th |
| Cousin primes (2nd member) | 64th | 80th |
| Good primes | 64th | 79th |
| Left-truncatable primes | 62nd | |
| Long primes | 156th | |
| Primes | 302nd | 390th |
| Prime triplets (1st member) | 50th | 59th |
| Prime triplets (2nd member) | 49th | 58th |
| Pythagorean primes | 147th | |
| Sexy primes (1st member) | 129th | 158th |
| Sexy prime triplets (1st member) | 58th | |
| Twin primes (1st member) | 61st | 76th |
| Roman numberals | MCMXCVII | MMDCLXXXVII |
| Base 2 | 111110011012 | 1010011111112 |
| Base 3 | 22012223 | 102001123 |
| Base 4 | 1330314 | 2213334 |
| Base 5 | 304425 | 412225 |
| Base 6 | 131256 | 202356 |
| Base 7 | 55527 | 105567 |
| Base 8 | 37158 | 51778 |
| Base 9 | 26589 | 36159 |
| Base 10 | 199710 | 268710 |
| Base 11 | 155611 | 202311 |
| Base 12 | 11a512 | 167b12 |
| Base 13 | ba813 | 12b913 |
| Base 14 | a2914 | d9d14 |
| Base 15 | 8d215 | be215 |
| Base 16 | 7cd16 | a7f16 |