Compare 639 vs 642
| Property | 639 | 642 |
|---|---|---|
| Type | composite number | composite number |
| Unique factors | 2 | 3 |
| Total factors | 3 | 3 |
| Prime factorization | 32 × 711 | 21 × 31 × 1071 |
| Prime factorization | 3 × 3 × 71 | 2 × 3 × 107 |
| Divisors count | 6 | 8 |
| Divisors | 1, 3, 9, 71, 213, 639 | 1, 2, 3, 6, 107, 214, 321, 642 |
| Number of properties | 0 | 0 |
| Roman numberals | DCXXXIX | DCXLII |
| Base 2 | 10011111112 | 10100000102 |
| Base 3 | 2122003 | 2122103 |
| Base 4 | 213334 | 220024 |
| Base 5 | 100245 | 100325 |
| Base 6 | 25436 | 25506 |
| Base 7 | 16027 | 16057 |
| Base 8 | 11778 | 12028 |
| Base 9 | 7809 | 7839 |
| Base 10 | 63910 | 64210 |
| Base 11 | 53111 | 53411 |
| Base 12 | 45312 | 45612 |
| Base 13 | 3a213 | 3a513 |
| Base 14 | 33914 | 33c14 |
| Base 15 | 2c915 | 2cc15 |
| Base 16 | 27f16 | 28216 |