Compare 345 vs 347
| Property | 345 | 347 |
|---|---|---|
| Type | composite number | prime |
| Unique factors | 3 | 1 |
| Total factors | 3 | 1 |
| Prime factorization | 31 × 51 × 231 | 3471 |
| Prime factorization | 3 × 5 × 23 | 347 |
| Divisors count | 8 | 2 |
| Divisors | 1, 3, 5, 15, 23, 69, 115, 345 | 1, 347 |
| Number of properties | 0 | 10 |
| Chen primes | 51st | |
| Emirps | 18th | |
| Good primes | 25th | |
| Left-truncatable primes | 26th | |
| Primes | 69th | |
| Prime triplets (1st member) | 20th | |
| Safe primes | 13th | |
| Sexy primes (1st member) | 38th | |
| Sexy prime triplets (1st member) | 18th | |
| Twin primes (1st member) | 21st | |
| Roman numberals | CCCXLV | CCCXLVII |
| Base 2 | 1010110012 | 1010110112 |
| Base 3 | 1102103 | 1102123 |
| Base 4 | 111214 | 111234 |
| Base 5 | 23405 | 23425 |
| Base 6 | 13336 | 13356 |
| Base 7 | 10027 | 10047 |
| Base 8 | 5318 | 5338 |
| Base 9 | 4239 | 4259 |
| Base 10 | 34510 | 34710 |
| Base 11 | 29411 | 29611 |
| Base 12 | 24912 | 24b12 |
| Base 13 | 20713 | 20913 |
| Base 14 | 1a914 | 1ab14 |
| Base 15 | 18015 | 18215 |
| Base 16 | 15916 | 15b16 |