Compare 1931 vs 1939
| Property | 1931 | 1939 |
|---|---|---|
| Type | prime | semiprime |
| Unique factors | 1 | 2 |
| Total factors | 1 | 2 |
| Prime factorization | 19311 | 71 × 2771 |
| Prime factorization | 1931 | 7 × 277 |
| Divisors count | 2 | 4 |
| Divisors | 1, 1931 | 1, 7, 277, 1939 |
| Number of properties | 5 | 1 |
| Chen primes | 182nd | |
| Harmonic primes | 108th | |
| Primes | 294th | |
| Semiprimes | 558th | |
| Sophie germain primes | 59th | |
| Twin primes (1st member) | 59th | |
| Roman numberals | MCMXXXI | MCMXXXIX |
| Base 2 | 111100010112 | 111100100112 |
| Base 3 | 21221123 | 21222113 |
| Base 4 | 1320234 | 1321034 |
| Base 5 | 302115 | 302245 |
| Base 6 | 125356 | 125516 |
| Base 7 | 54267 | 54407 |
| Base 8 | 36138 | 36238 |
| Base 9 | 25759 | 25849 |
| Base 10 | 193110 | 193910 |
| Base 11 | 14a611 | 150311 |
| Base 12 | 114b12 | 115712 |
| Base 13 | b5713 | b6213 |
| Base 14 | 9bd14 | 9c714 |
| Base 15 | 88b15 | 89415 |
| Base 16 | 78b16 | 79316 |