Compare 291 vs 293
| Property | 291 | 293 |
|---|---|---|
| Type | semiprime | prime |
| Unique factors | 2 | 1 |
| Total factors | 2 | 1 |
| Prime factorization | 31 × 971 | 2931 |
| Prime factorization | 3 × 97 | 293 |
| Divisors count | 4 | 2 |
| Divisors | 1, 3, 97, 291 | 1, 293 |
| Number of properties | 1 | 8 |
| Chen primes | 46th | |
| Happy primes | 15th | |
| Harmonic primes | 24th | |
| Isolated primes | 25th | |
| Primes | 62nd | |
| Pythagorean primes | 29th | |
| Right-truncatable primes | 16th | |
| Semiprimes | 91st | |
| Sophie germain primes | 20th | |
| Roman numberals | CCXCI | CCXCIII |
| Base 2 | 1001000112 | 1001001012 |
| Base 3 | 1012103 | 1012123 |
| Base 4 | 102034 | 102114 |
| Base 5 | 21315 | 21335 |
| Base 6 | 12036 | 12056 |
| Base 7 | 5647 | 5667 |
| Base 8 | 4438 | 4458 |
| Base 9 | 3539 | 3559 |
| Base 10 | 29110 | 29310 |
| Base 11 | 24511 | 24711 |
| Base 12 | 20312 | 20512 |
| Base 13 | 19513 | 19713 |
| Base 14 | 16b14 | 16d14 |
| Base 15 | 14615 | 14815 |
| Base 16 | 12316 | 12516 |