Compare 21391 vs 21397
| Property | 21391 | 21397 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 213911 | 213971 |
| Prime factorization | 21391 | 21397 |
| Divisors count | 2 | 2 |
| Divisors | 1, 21391 | 1, 21397 |
| Number of properties | 3 | 5 |
| Cousin primes (1st member) | 365th | |
| Isolated primes | 1676th | 1677th |
| Primes | 2401st | 2402nd |
| Pythagorean primes | 1191st | |
| Sexy primes (1st member) | 729th | |
| Sexy primes (2nd member) | 729th | |
| Roman numberals | ||
| Base 2 | 1010011100011112 | 1010011100101012 |
| Base 3 | 10021000213 | 10021001113 |
| Base 4 | 110320334 | 110321114 |
| Base 5 | 11410315 | 11410425 |
| Base 6 | 2430116 | 2430216 |
| Base 7 | 1162367 | 1162457 |
| Base 8 | 516178 | 516258 |
| Base 9 | 323079 | 323149 |
| Base 10 | 2139110 | 2139710 |
| Base 11 | 1508711 | 1509211 |
| Base 12 | 1046712 | 1047112 |
| Base 13 | 997613 | 997c13 |
| Base 14 | 7b1d14 | 7b2514 |
| Base 15 | 651115 | 651715 |
| Base 16 | 538f16 | 539516 |