Compare 129 vs 137
| Property | 129 | 137 |
|---|---|---|
| Type | semiprime | prime |
| Unique factors | 2 | 1 |
| Total factors | 2 | 1 |
| Prime factorization | 31 × 431 | 1371 |
| Prime factorization | 3 × 43 | 137 |
| Divisors count | 4 | 2 |
| Divisors | 1, 3, 43, 129 | 1, 137 |
| Number of properties | 1 | 8 |
| Additive primes | 18th | |
| Chen primes | 27th | |
| Left-truncatable primes | 17th | |
| Primes | 33rd | |
| Pythagorean primes | 15th | |
| Semiprimes | 43rd | |
| Sexy primes (2nd member) | 20th | |
| Solinas primes | 24th | |
| Twin primes (1st member) | 11th | |
| Roman numberals | CXXIX | CXXXVII |
| Base 2 | 100000012 | 100010012 |
| Base 3 | 112103 | 120023 |
| Base 4 | 20014 | 20214 |
| Base 5 | 10045 | 10225 |
| Base 6 | 3336 | 3456 |
| Base 7 | 2437 | 2547 |
| Base 8 | 2018 | 2118 |
| Base 9 | 1539 | 1629 |
| Base 10 | 12910 | 13710 |
| Base 11 | 10811 | 11511 |
| Base 12 | a912 | b512 |
| Base 13 | 9c13 | a713 |
| Base 14 | 9314 | 9b14 |
| Base 15 | 8915 | 9215 |
| Base 16 | 8116 | 8916 |