Compare 1997 vs 2161
| Property | 1997 | 2161 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 19971 | 21611 |
| Prime factorization | 1997 | 2161 |
| Divisors count | 2 | 2 |
| Divisors | 1, 1997 | 1, 2161 |
| Number of properties | 10 | 3 |
| Chen primes | 185th | |
| Cousin primes (2nd member) | 64th | |
| Good primes | 64th | |
| Isolated primes | 193rd | |
| Left-truncatable primes | 62nd | |
| Primes | 302nd | 326th |
| Prime triplets (1st member) | 50th | |
| Prime triplets (2nd member) | 49th | |
| Pythagorean primes | 147th | 159th |
| Sexy primes (1st member) | 129th | |
| Twin primes (1st member) | 61st | |
| Roman numberals | MCMXCVII | MMCLXI |
| Base 2 | 111110011012 | 1000011100012 |
| Base 3 | 22012223 | 22220013 |
| Base 4 | 1330314 | 2013014 |
| Base 5 | 304425 | 321215 |
| Base 6 | 131256 | 140016 |
| Base 7 | 55527 | 62057 |
| Base 8 | 37158 | 41618 |
| Base 9 | 26589 | 28619 |
| Base 10 | 199710 | 216110 |
| Base 11 | 155611 | 169511 |
| Base 12 | 11a512 | 130112 |
| Base 13 | ba813 | ca313 |
| Base 14 | a2914 | b0514 |
| Base 15 | 8d215 | 99115 |
| Base 16 | 7cd16 | 87116 |