Compare 640691 vs 641969
| Property | 640691 | 641969 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 6406911 | 6419691 |
| Prime factorization | 640691 | 641969 |
| Divisors count | 2 | 2 |
| Divisors | 1, 640691 | 1, 641969 |
| Number of properties | 5 | 3 |
| Chen primes | 20397th | |
| Cousin primes (2nd member) | 5637th | |
| Isolated primes | 40853rd | 40930th |
| Primes | 52128th | 52221st |
| Sophie germain primes | 5311th | 5322nd |
| Roman numberals | ||
| Base 2 | 100111000110101100112 | 100111001011101100012 |
| Base 3 | 10121122120223 | 10121211211223 |
| Base 4 | 21301223034 | 21302323014 |
| Base 5 | 1310002315 | 1310203345 |
| Base 6 | 214220556 | 214320256 |
| Base 7 | 53056227 | 53124267 |
| Base 8 | 23432638 | 23456618 |
| Base 9 | 11757689 | 11775489 |
| Base 10 | 64069110 | 64196910 |
| Base 11 | 3a83a711 | 3a935911 |
| Base 12 | 26a92b12 | 26b61512 |
| Base 13 | 19580c13 | 19628313 |
| Base 14 | 1296b914 | 129d4d14 |
| Base 15 | c9c7b15 | ca32e15 |
| Base 16 | 9c6b316 | 9cbb116 |