Compare 661439 vs 663539
| Property | 661439 | 663539 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 6614391 | 6635391 |
| Prime factorization | 661439 | 663539 |
| Divisors count | 2 | 2 |
| Divisors | 1, 661439 | 1, 663539 |
| Number of properties | 5 | 5 |
| Additive primes | 20957th | |
| Chen primes | 21050th | |
| Good primes | 2038th | |
| Isolated primes | 42097th | |
| Primes | 53680th | 53826th |
| Safe primes | 3100th | 3106th |
| Twin primes (1st member) | 5808th | |
| Ulam primes | 3940th | |
| Roman numberals | ||
| Base 2 | 101000010111101111112 | 101000011111111100112 |
| Base 3 | 10201210222023 | 10202010121123 |
| Base 4 | 22011323334 | 22013333034 |
| Base 5 | 1321312245 | 1322131245 |
| Base 6 | 221021156 | 221155356 |
| Base 7 | 54232527 | 54323427 |
| Base 8 | 24136778 | 24177638 |
| Base 9 | 12172829 | 12211759 |
| Base 10 | 66143910 | 66353910 |
| Base 11 | 411a4911 | 41358811 |
| Base 12 | 27a93b12 | 27bbab12 |
| Base 13 | 1a20ac13 | 1a303613 |
| Base 14 | 13309914 | 133b5914 |
| Base 15 | d0eae15 | d190e15 |
| Base 16 | a17bf16 | a1ff316 |