Compare 640919 vs 642737
| Property | 640919 | 642737 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 6409191 | 6427371 |
| Prime factorization | 640919 | 642737 |
| Divisors count | 2 | 2 |
| Divisors | 1, 640919 | 1, 642737 |
| Number of properties | 5 | 6 |
| Additive primes | 20378th | 20428th |
| Chen primes | 20405th | 20445th |
| Good primes | 1988th | |
| Isolated primes | 40868th | |
| Primes | 52143rd | 52268th |
| Twin primes (1st member) | 5653rd | |
| Ulam primes | 3821st | 3832nd |
| Roman numberals | ||
| Base 2 | 100111000111100101112 | 100111001110101100012 |
| Base 3 | 10121200112023 | 10121222000023 |
| Base 4 | 21301321134 | 21303223014 |
| Base 5 | 1310021345 | 1310314225 |
| Base 6 | 214231156 | 214353456 |
| Base 7 | 53063667 | 53146047 |
| Base 8 | 23436278 | 23472618 |
| Base 9 | 11761529 | 11786029 |
| Base 10 | 64091910 | 64273710 |
| Base 11 | 3a859411 | 3a999711 |
| Base 12 | 26aa9b12 | 26bb5512 |
| Base 13 | 19595613 | 19672413 |
| Base 14 | 1297dd14 | 12a33b14 |
| Base 15 | c9d7e15 | ca69215 |
| Base 16 | 9c79716 | 9ceb116 |