Compare 640947 vs 640949
| Property | 640947 | 640949 |
|---|---|---|
| Type | semiprime | prime |
| Unique factors | 2 | 1 |
| Total factors | 2 | 1 |
| Prime factorization | 31 × 2136491 | 6409491 |
| Prime factorization | 3 × 213649 | 640949 |
| Divisors count | 4 | 2 |
| Divisors | 1, 3, 213649, 640947 | 1, 640949 |
| Number of properties | 1 | 5 |
| Happy primes | 7420th | |
| Isolated primes | 40871st | |
| Primes | 52146th | |
| Semiprimes | 137340th | |
| Sexy primes (2nd member) | 11299th | |
| Sophie germain primes | 5314th | |
| Roman numberals | ||
| Base 2 | 100111000111101100112 | 100111000111101101012 |
| Base 3 | 10121200122103 | 10121200122123 |
| Base 4 | 21301323034 | 21301323114 |
| Base 5 | 1310022425 | 1310022445 |
| Base 6 | 214232036 | 214232056 |
| Base 7 | 53064367 | 53064417 |
| Base 8 | 23436638 | 23436658 |
| Base 9 | 11761839 | 11761859 |
| Base 10 | 64094710 | 64094910 |
| Base 11 | 3a860a11 | 3a861111 |
| Base 12 | 26ab0312 | 26ab0512 |
| Base 13 | 19597813 | 19597a13 |
| Base 14 | 12981d14 | 12982114 |
| Base 15 | c9d9c15 | c9d9e15 |
| Base 16 | 9c7b316 | 9c7b516 |