Compare 661421 vs 661439
| Property | 661421 | 661439 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 6614211 | 6614391 |
| Prime factorization | 661421 | 661439 |
| Divisors count | 2 | 2 |
| Divisors | 1, 661421 | 1, 661439 |
| Number of properties | 5 | 5 |
| Additive primes | 20957th | |
| Cousin primes (2nd member) | 5786th | |
| Happy primes | 7610th | |
| Isolated primes | 42096th | 42097th |
| Primes | 53679th | 53680th |
| Safe primes | 3100th | |
| Sophie germain primes | 5457th | |
| Ulam primes | 3940th | |
| Roman numberals | ||
| Base 2 | 101000010111101011012 | 101000010111101111112 |
| Base 3 | 10201210220023 | 10201210222023 |
| Base 4 | 22011322314 | 22011323334 |
| Base 5 | 1321311415 | 1321312245 |
| Base 6 | 221020456 | 221021156 |
| Base 7 | 54232257 | 54232527 |
| Base 8 | 24136558 | 24136778 |
| Base 9 | 12172629 | 12172829 |
| Base 10 | 66142110 | 66143910 |
| Base 11 | 411a3211 | 411a4911 |
| Base 12 | 27a92512 | 27a93b12 |
| Base 13 | 1a209713 | 1a20ac13 |
| Base 14 | 13308514 | 13309914 |
| Base 15 | d0e9b15 | d0eae15 |
| Base 16 | a17ad16 | a17bf16 |