Compare 643 vs 655
Property | 643 | 655 |
---|---|---|
Type | prime | semiprime |
Unique factors | 1 | 2 |
Total factors | 1 | 2 |
Prime factorization | 6431 | 51 × 1311 |
Prime factorization | 643 | 5 × 131 |
Divisors count | 2 | 4 |
Divisors | 1, 643 | 1, 5, 131, 655 |
Number of properties | 7 | 1 |
Additive primes | 63rd | |
Cousin primes (1st member) | 29th | |
Left-truncatable primes | 38th | |
Lucky primes | 33rd | |
Primes | 117th | |
Prime triplets (2nd member) | 24th | |
Semiprimes | 197th | |
Twin primes (2nd member) | 29th | |
Roman numberals | DCXLIII | DCLV |
Base 2 | 10100000112 | 10100011112 |
Base 3 | 2122113 | 2200213 |
Base 4 | 220034 | 220334 |
Base 5 | 100335 | 101105 |
Base 6 | 25516 | 30116 |
Base 7 | 16067 | 16247 |
Base 8 | 12038 | 12178 |
Base 9 | 7849 | 8079 |
Base 10 | 64310 | 65510 |
Base 11 | 53511 | 54611 |
Base 12 | 45712 | 46712 |
Base 13 | 3a613 | 3b513 |
Base 14 | 33d14 | 34b14 |
Base 15 | 2cd15 | 2da15 |
Base 16 | 28316 | 28f16 |