Compare 21391 vs 21767
| Property | 21391 | 21767 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 213911 | 217671 |
| Prime factorization | 21391 | 21767 |
| Divisors count | 2 | 2 |
| Divisors | 1, 21391 | 1, 21767 |
| Number of properties | 3 | 8 |
| Additive primes | 1131st | |
| Chen primes | 1200th | |
| Happy primes | 404th | |
| Isolated primes | 1676th | 1701st |
| Long primes | 924th | |
| Primes | 2401st | 2442nd |
| Safe primes | 206th | |
| Sexy primes (1st member) | 729th | 740th |
| Roman numberals | ||
| Base 2 | 1010011100011112 | 1010101000001112 |
| Base 3 | 10021000213 | 10022120123 |
| Base 4 | 110320334 | 111100134 |
| Base 5 | 11410315 | 11440325 |
| Base 6 | 2430116 | 2444356 |
| Base 7 | 1162367 | 1203147 |
| Base 8 | 516178 | 524078 |
| Base 9 | 323079 | 327659 |
| Base 10 | 2139110 | 2176710 |
| Base 11 | 1508711 | 1539911 |
| Base 12 | 1046712 | 1071b12 |
| Base 13 | 997613 | 9ba513 |
| Base 14 | 7b1d14 | 7d0b14 |
| Base 15 | 651115 | 66b215 |
| Base 16 | 538f16 | 550716 |