Compare 389 vs 521
| Property | 389 | 521 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 3891 | 5211 |
| Prime factorization | 389 | 521 |
| Divisors count | 2 | 2 |
| Divisors | 1, 389 | 1, 521 |
| Number of properties | 7 | 6 |
| Chen primes | 55th | 70th |
| Emirps | 20th | |
| Isolated primes | 36th | |
| Long primes | 29th | |
| Lucas primes | 8th | |
| Primes | 77th | 98th |
| Pythagorean primes | 36th | 46th |
| Sexy primes (2nd member) | 42nd | |
| Solinas primes | 39th | |
| Twin primes (1st member) | 25th | |
| Roman numberals | CCCLXXXIX | DXXI |
| Base 2 | 1100001012 | 10000010012 |
| Base 3 | 1121023 | 2010223 |
| Base 4 | 120114 | 200214 |
| Base 5 | 30245 | 40415 |
| Base 6 | 14456 | 22256 |
| Base 7 | 10647 | 13437 |
| Base 8 | 6058 | 10118 |
| Base 9 | 4729 | 6389 |
| Base 10 | 38910 | 52110 |
| Base 11 | 32411 | 43411 |
| Base 12 | 28512 | 37512 |
| Base 13 | 23c13 | 31113 |
| Base 14 | 1db14 | 29314 |
| Base 15 | 1ae15 | 24b15 |
| Base 16 | 18516 | 20916 |