Compare 21977 vs 21991
| Property | 21977 | 21991 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 219771 | 219911 |
| Prime factorization | 21977 | 21991 |
| Divisors count | 2 | 2 |
| Divisors | 1, 21977 | 1, 21991 |
| Number of properties | 6 | 5 |
| Chen primes | 1207th | 1208th |
| Harmonic primes | 906th | |
| Isolated primes | 1719th | 1720th |
| Long primes | 931st | |
| Primes | 2462nd | 2463rd |
| Pythagorean primes | 1222nd | |
| Sexy primes (1st member) | 742nd | |
| Sexy prime triplets (1st member) | 202nd | |
| Roman numberals | ||
| Base 2 | 1010101110110012 | 1010101111001112 |
| Base 3 | 10100102223 | 10100111113 |
| Base 4 | 111131214 | 111132134 |
| Base 5 | 12004025 | 12004315 |
| Base 6 | 2454256 | 2454516 |
| Base 7 | 1210347 | 1210547 |
| Base 8 | 527318 | 527478 |
| Base 9 | 331289 | 331449 |
| Base 10 | 2197710 | 2199110 |
| Base 11 | 1556a11 | 1558211 |
| Base 12 | 1087512 | 1088712 |
| Base 13 | a00713 | a01813 |
| Base 14 | 801b14 | 802b14 |
| Base 15 | 67a215 | 67b115 |
| Base 16 | 55d916 | 55e716 |