Compare 640667 vs 641519
| Property | 640667 | 641519 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 6406671 | 6415191 |
| Prime factorization | 640667 | 641519 |
| Divisors count | 2 | 2 |
| Divisors | 1, 640667 | 1, 641519 |
| Number of properties | 6 | 5 |
| Additive primes | 20371st | |
| Chen primes | 20395th | 20417th |
| Cousin primes (2nd member) | 5636th | |
| Primes | 52125th | 52187th |
| Prime triplets (2nd member) | 2063rd | |
| Safe primes | 3024th | |
| Sexy primes (2nd member) | 11307th | |
| Twin primes (1st member) | 5638th | 5641st |
| Roman numberals | ||
| Base 2 | 100111000110100110112 | 100111001001111011112 |
| Base 3 | 10121122111023 | 10121202222223 |
| Base 4 | 21301221234 | 21302132334 |
| Base 5 | 1310001325 | 1310120345 |
| Base 6 | 214220156 | 214255556 |
| Base 7 | 53055567 | 53112147 |
| Base 8 | 23432338 | 23447578 |
| Base 9 | 11757429 | 11768889 |
| Base 10 | 64066710 | 64151910 |
| Base 11 | 3a838511 | 3a8a8a11 |
| Base 12 | 26a90b12 | 26b2bb12 |
| Base 13 | 1957c113 | 195cc813 |
| Base 14 | 12969d14 | 129b0b14 |
| Base 15 | c9c6215 | ca12e15 |
| Base 16 | 9c69b16 | 9c9ef16 |