Compare 640667 vs 642149
| Property | 640667 | 642149 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 6406671 | 6421491 |
| Prime factorization | 640667 | 642149 |
| Divisors count | 2 | 2 |
| Divisors | 1, 640667 | 1, 642149 |
| Number of properties | 6 | 3 |
| Additive primes | 20371st | |
| Chen primes | 20395th | 20432nd |
| Cousin primes (2nd member) | 5636th | |
| Primes | 52125th | 52232nd |
| Prime triplets (2nd member) | 2063rd | |
| Twin primes (1st member) | 5638th | 5649th |
| Roman numberals | ||
| Base 2 | 100111000110100110112 | 100111001100011001012 |
| Base 3 | 10121122111023 | 10121212120223 |
| Base 4 | 21301221234 | 21303012114 |
| Base 5 | 1310001325 | 1310220445 |
| Base 6 | 214220156 | 214325256 |
| Base 7 | 53055567 | 53131047 |
| Base 8 | 23432338 | 23461458 |
| Base 9 | 11757429 | 11777689 |
| Base 10 | 64066710 | 64214910 |
| Base 11 | 3a838511 | 3a950211 |
| Base 12 | 26a90b12 | 26b74512 |
| Base 13 | 1957c113 | 19639113 |
| Base 14 | 12969d14 | 12a03b14 |
| Base 15 | c9c6215 | ca3ee15 |
| Base 16 | 9c69b16 | 9cc6516 |