Compare 663977 vs 663981
| Property | 663977 | 663981 |
|---|---|---|
| Type | prime | semiprime |
| Unique factors | 1 | 2 |
| Total factors | 1 | 2 |
| Prime factorization | 6639771 | 31 × 2213271 |
| Prime factorization | 663977 | 3 × 221327 |
| Divisors count | 2 | 4 |
| Divisors | 1, 663977 | 1, 3, 221327, 663981 |
| Number of properties | 7 | 1 |
| Chen primes | 21067th | |
| Cousin primes (2nd member) | 5808th | |
| Primes | 53864th | |
| Prime triplets (1st member) | 2118th | |
| Prime triplets (2nd member) | 2117th | |
| Semiprimes | 142064th | |
| Sexy primes (1st member) | 11628th | |
| Twin primes (1st member) | 5816th | |
| Roman numberals | ||
| Base 2 | 101000100001101010012 | 101000100001101011012 |
| Base 3 | 10202012102023 | 10202012102203 |
| Base 4 | 22020122214 | 22020122314 |
| Base 5 | 1322214025 | 1322214115 |
| Base 6 | 221215456 | 221215536 |
| Base 7 | 54335367 | 54335437 |
| Base 8 | 24206518 | 24206558 |
| Base 9 | 12217229 | 12217269 |
| Base 10 | 66397710 | 66398110 |
| Base 11 | 41394611 | 41394a11 |
| Base 12 | 2802b512 | 2802b912 |
| Base 13 | 1a32b213 | 1a32b613 |
| Base 14 | 133d8d14 | 133d9314 |
| Base 15 | d1b0215 | d1b0615 |
| Base 16 | a21a916 | a21ad16 |