Compare 397 vs 403
| Property | 397 | 403 |
|---|---|---|
| Type | prime | semiprime |
| Unique factors | 1 | 2 |
| Total factors | 1 | 2 |
| Prime factorization | 3971 | 131 × 311 |
| Prime factorization | 397 | 13 × 31 |
| Divisors count | 2 | 4 |
| Divisors | 1, 397 | 1, 13, 31, 403 |
| Number of properties | 8 | 1 |
| 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 | 127th | |
| Roman numberals | CCCXCVII | CDIII |
| Base 2 | 1100011012 | 1100100112 |
| Base 3 | 1122013 | 1122213 |
| Base 4 | 120314 | 121034 |
| Base 5 | 30425 | 31035 |
| Base 6 | 15016 | 15116 |
| Base 7 | 11057 | 11147 |
| Base 8 | 6158 | 6238 |
| Base 9 | 4819 | 4879 |
| Base 10 | 39710 | 40310 |
| Base 11 | 33111 | 33711 |
| Base 12 | 29112 | 29712 |
| Base 13 | 24713 | 25013 |
| Base 14 | 20514 | 20b14 |
| Base 15 | 1b715 | 1bd15 |
| Base 16 | 18d16 | 19316 |