Compare 393 vs 397
| Property | 393 | 397 |
|---|---|---|
| Type | semiprime | prime |
| Unique factors | 2 | 1 |
| Total factors | 2 | 1 |
| Prime factorization | 31 × 1311 | 3971 |
| Prime factorization | 3 × 131 | 397 |
| Divisors count | 4 | 2 |
| Divisors | 1, 3, 131, 393 | 1, 397 |
| Number of properties | 1 | 8 |
| Additive primes | 45th | |
| Cousin primes (1st member) | 22nd | |
| Cuban primes 1 | 8th | |
| Happy primes | 21st | |
| Isolated primes | 37th | |
| Left-truncatable primes | 31st | |
| Primes | 78th | |
| Pythagorean primes | 37th | |
| Semiprimes | 123rd | |
| Roman numberals | CCCXCIII | CCCXCVII |
| Base 2 | 1100010012 | 1100011012 |
| Base 3 | 1121203 | 1122013 |
| Base 4 | 120214 | 120314 |
| Base 5 | 30335 | 30425 |
| Base 6 | 14536 | 15016 |
| Base 7 | 11017 | 11057 |
| Base 8 | 6118 | 6158 |
| Base 9 | 4769 | 4819 |
| Base 10 | 39310 | 39710 |
| Base 11 | 32811 | 33111 |
| Base 12 | 28912 | 29112 |
| Base 13 | 24313 | 24713 |
| Base 14 | 20114 | 20514 |
| Base 15 | 1b315 | 1b715 |
| Base 16 | 18916 | 18d16 |