Compare 137 vs 145
| Property | 137 | 145 |
|---|---|---|
| Type | prime | semiprime |
| Unique factors | 1 | 2 |
| Total factors | 1 | 2 |
| Prime factorization | 1371 | 51 × 291 |
| Prime factorization | 137 | 5 × 29 |
| Divisors count | 2 | 4 |
| Divisors | 1, 137 | 1, 5, 29, 145 |
| Number of properties | 8 | 1 |
| Additive primes | 18th | |
| Chen primes | 27th | |
| Left-truncatable primes | 17th | |
| Primes | 33rd | |
| Pythagorean primes | 15th | |
| Semiprimes | 49th | |
| Sexy primes (2nd member) | 20th | |
| Solinas primes | 24th | |
| Twin primes (1st member) | 11th | |
| Roman numberals | CXXXVII | CXLV |
| Base 2 | 100010012 | 100100012 |
| Base 3 | 120023 | 121013 |
| Base 4 | 20214 | 21014 |
| Base 5 | 10225 | 10405 |
| Base 6 | 3456 | 4016 |
| Base 7 | 2547 | 2657 |
| Base 8 | 2118 | 2218 |
| Base 9 | 1629 | 1719 |
| Base 10 | 13710 | 14510 |
| Base 11 | 11511 | 12211 |
| Base 12 | b512 | 10112 |
| Base 13 | a713 | b213 |
| Base 14 | 9b14 | a514 |
| Base 15 | 9215 | 9a15 |
| Base 16 | 8916 | 9116 |