Compare 640945 vs 640949
| Property | 640945 | 640949 |
|---|---|---|
| Type | semiprime | prime |
| Unique factors | 2 | 1 |
| Total factors | 2 | 1 |
| Prime factorization | 51 × 1281891 | 6409491 |
| Prime factorization | 5 × 128189 | 640949 |
| Divisors count | 4 | 2 |
| Divisors | 1, 5, 128189, 640945 | 1, 640949 |
| Number of properties | 1 | 5 |
| Happy primes | 7420th | |
| Isolated primes | 40871st | |
| Primes | 52146th | |
| Semiprimes | 137339th | |
| Sexy primes (2nd member) | 11299th | |
| Sophie germain primes | 5314th | |
| Roman numberals | ||
| Base 2 | 100111000111101100012 | 100111000111101101012 |
| Base 3 | 10121200122013 | 10121200122123 |
| Base 4 | 21301323014 | 21301323114 |
| Base 5 | 1310022405 | 1310022445 |
| Base 6 | 214232016 | 214232056 |
| Base 7 | 53064347 | 53064417 |
| Base 8 | 23436618 | 23436658 |
| Base 9 | 11761819 | 11761859 |
| Base 10 | 64094510 | 64094910 |
| Base 11 | 3a860811 | 3a861111 |
| Base 12 | 26ab0112 | 26ab0512 |
| Base 13 | 19597613 | 19597a13 |
| Base 14 | 12981b14 | 12982114 |
| Base 15 | c9d9a15 | c9d9e15 |
| Base 16 | 9c7b116 | 9c7b516 |