Compare 1997 vs 2381
| Property | 1997 | 2381 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 19971 | 23811 |
| Prime factorization | 1997 | 2381 |
| Divisors count | 2 | 2 |
| Divisors | 1, 1997 | 1, 2381 |
| Number of properties | 10 | 9 |
| Centered square primes | 17th | |
| Chen primes | 185th | 213th |
| Cousin primes (2nd member) | 64th | 73rd |
| Good primes | 64th | |
| Harmonic primes | 132nd | |
| Left-truncatable primes | 62nd | |
| Primes | 302nd | 353rd |
| Prime triplets (1st member) | 50th | |
| Prime triplets (2nd member) | 49th | 56th |
| Pythagorean primes | 147th | 173rd |
| Sexy primes (1st member) | 129th | |
| Super primes | 71st | |
| Twin primes (1st member) | 61st | 72nd |
| Roman numberals | MCMXCVII | MMCCCLXXXI |
| Base 2 | 111110011012 | 1001010011012 |
| Base 3 | 22012223 | 100210123 |
| Base 4 | 1330314 | 2110314 |
| Base 5 | 304425 | 340115 |
| Base 6 | 131256 | 150056 |
| Base 7 | 55527 | 66417 |
| Base 8 | 37158 | 45158 |
| Base 9 | 26589 | 32359 |
| Base 10 | 199710 | 238110 |
| Base 11 | 155611 | 187511 |
| Base 12 | 11a512 | 146512 |
| Base 13 | ba813 | 111213 |
| Base 14 | a2914 | c2114 |
| Base 15 | 8d215 | a8b15 |
| Base 16 | 7cd16 | 94d16 |