Compare 349 vs 643
| Property | 349 | 643 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 3491 | 6431 |
| Prime factorization | 349 | 643 |
| Divisors count | 2 | 2 |
| Divisors | 1, 349 | 1, 643 |
| Number of properties | 7 | 7 |
| Additive primes | 63rd | |
| Cousin primes (1st member) | 20th | 29th |
| Harmonic primes | 30th | |
| Left-truncatable primes | 38th | |
| Lucky primes | 20th | 33rd |
| Primes | 70th | 117th |
| Prime triplets (2nd member) | 20th | 24th |
| Pythagorean primes | 33rd | |
| Twin primes (2nd member) | 21st | 29th |
| Roman numberals | CCCXLIX | DCXLIII |
| Base 2 | 1010111012 | 10100000112 |
| Base 3 | 1102213 | 2122113 |
| Base 4 | 111314 | 220034 |
| Base 5 | 23445 | 100335 |
| Base 6 | 13416 | 25516 |
| Base 7 | 10067 | 16067 |
| Base 8 | 5358 | 12038 |
| Base 9 | 4279 | 7849 |
| Base 10 | 34910 | 64310 |
| Base 11 | 29811 | 53511 |
| Base 12 | 25112 | 45712 |
| Base 13 | 20b13 | 3a613 |
| Base 14 | 1ad14 | 33d14 |
| Base 15 | 18415 | 2cd15 |
| Base 16 | 15d16 | 28316 |