Compare 1997 vs 2081
| Property | 1997 | 2081 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 19971 | 20811 |
| Prime factorization | 1997 | 2081 |
| Divisors count | 2 | 2 |
| Divisors | 1, 1997 | 1, 2081 |
| Number of properties | 10 | 10 |
| Additive primes | 162nd | |
| Chen primes | 185th | 192nd |
| Cousin primes (2nd member) | 64th | |
| Good primes | 64th | |
| Left-truncatable primes | 62nd | |
| Primes | 302nd | 313th |
| Prime quadruplets (1st member) | 8th | |
| Prime triplets (1st member) | 50th | 51st |
| Prime triplets (2nd member) | 49th | |
| Pythagorean primes | 147th | 152nd |
| Sexy primes (1st member) | 129th | 132nd |
| Solinas primes | 58th | |
| Super primes | 65th | |
| Twin primes (1st member) | 61st | 63rd |
| Roman numberals | MCMXCVII | MMLXXXI |
| Base 2 | 111110011012 | 1000001000012 |
| Base 3 | 22012223 | 22120023 |
| Base 4 | 1330314 | 2002014 |
| Base 5 | 304425 | 313115 |
| Base 6 | 131256 | 133456 |
| Base 7 | 55527 | 60327 |
| Base 8 | 37158 | 40418 |
| Base 9 | 26589 | 27629 |
| Base 10 | 199710 | 208110 |
| Base 11 | 155611 | 162211 |
| Base 12 | 11a512 | 125512 |
| Base 13 | ba813 | c4113 |
| Base 14 | a2914 | a8914 |
| Base 15 | 8d215 | 93b15 |
| Base 16 | 7cd16 | 82116 |