Compare 640981 vs 640993
| Property | 640981 | 640993 |
|---|---|---|
| Type | semiprime | prime |
| Unique factors | 2 | 1 |
| Total factors | 2 | 1 |
| Prime factorization | 111 × 582711 | 6409931 |
| Prime factorization | 11 × 58271 | 640993 |
| Divisors count | 4 | 2 |
| Divisors | 1, 11, 58271, 640981 | 1, 640993 |
| Number of properties | 1 | 3 |
| Additive primes | 20381st | |
| Isolated primes | 40876th | |
| Primes | 52151st | |
| Semiprimes | 137346th | |
| Roman numberals | ||
| Base 2 | 100111000111110101012 | 100111000111111000012 |
| Base 3 | 10121200210013 | 10121200211113 |
| Base 4 | 21301331114 | 21301332014 |
| Base 5 | 1310024115 | 1310024335 |
| Base 6 | 214233016 | 214233216 |
| Base 7 | 53065157 | 53065337 |
| Base 8 | 23437258 | 23437418 |
| Base 9 | 11762319 | 11762449 |
| Base 10 | 64098110 | 64099310 |
| Base 11 | 3a864011 | 3a865111 |
| Base 12 | 26ab3112 | 26ab4112 |
| Base 13 | 1959a313 | 1959b213 |
| Base 14 | 12984514 | 12985314 |
| Base 15 | c9dc115 | c9dcd15 |
| Base 16 | 9c7d516 | 9c7e116 |