Compare 397 vs 400
| Property | 397 | 400 |
|---|---|---|
| Type | prime | composite number |
| Unique factors | 1 | 2 |
| Total factors | 1 | 6 |
| Prime factorization | 3971 | 24 × 52 |
| Prime factorization | 397 | 2 × 2 × 2 × 2 × 5 × 5 |
| Divisors count | 2 | 15 |
| Divisors | 1, 397 | 1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400 |
| Number of properties | 8 | 0 |
| 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 | |
| Roman numberals | CCCXCVII | CD |
| Base 2 | 1100011012 | 1100100002 |
| Base 3 | 1122013 | 1122113 |
| Base 4 | 120314 | 121004 |
| Base 5 | 30425 | 31005 |
| Base 6 | 15016 | 15046 |
| Base 7 | 11057 | 11117 |
| Base 8 | 6158 | 6208 |
| Base 9 | 4819 | 4849 |
| Base 10 | 39710 | 40010 |
| Base 11 | 33111 | 33411 |
| Base 12 | 29112 | 29412 |
| Base 13 | 24713 | 24a13 |
| Base 14 | 20514 | 20814 |
| Base 15 | 1b715 | 1ba15 |
| Base 16 | 18d16 | 19016 |