Compare 6421 vs 6689
| Property | 6421 | 6689 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 64211 | 66891 |
| Prime factorization | 6421 | 6689 |
| Divisors count | 2 | 2 |
| Divisors | 1, 6421 | 1, 6689 |
| Number of properties | 7 | 6 |
| Additive primes | 419th | 429th |
| Chen primes | 456th | 470th |
| Good primes | 135th | |
| Harmonic primes | 301st | |
| Isolated primes | 538th | |
| Primes | 835th | 862nd |
| Pythagorean primes | 410th | 425th |
| Sexy primes (1st member) | 302nd | |
| Twin primes (1st member) | 154th | |
| Roman numberals | ||
| Base 2 | 11001000101012 | 11010001000012 |
| Base 3 | 222102113 | 1000112023 |
| Base 4 | 12101114 | 12202014 |
| Base 5 | 2011415 | 2032245 |
| Base 6 | 454216 | 505456 |
| Base 7 | 245027 | 253347 |
| Base 8 | 144258 | 150418 |
| Base 9 | 87249 | 101529 |
| Base 10 | 642110 | 668910 |
| Base 11 | 490811 | 503111 |
| Base 12 | 387112 | 3a5512 |
| Base 13 | 2bcc13 | 307713 |
| Base 14 | 24a914 | 261b14 |
| Base 15 | 1d8115 | 1eae15 |
| Base 16 | 191516 | 1a2116 |