Compare 1645 vs 1649
| Property | 1645 | 1649 |
|---|---|---|
| Type | composite number | semiprime |
| Unique factors | 3 | 2 |
| Total factors | 3 | 2 |
| Prime factorization | 51 × 71 × 471 | 171 × 971 |
| Prime factorization | 5 × 7 × 47 | 17 × 97 |
| Divisors count | 8 | 4 |
| Divisors | 1, 5, 7, 35, 47, 235, 329, 1645 | 1, 17, 97, 1649 |
| Number of properties | 0 | 1 |
| Semiprimes | 474th | |
| Roman numberals | MDCXLV | MDCXLIX |
| Base 2 | 110011011012 | 110011100012 |
| Base 3 | 20202213 | 20210023 |
| Base 4 | 1212314 | 1213014 |
| Base 5 | 230405 | 230445 |
| Base 6 | 113416 | 113456 |
| Base 7 | 45407 | 45447 |
| Base 8 | 31558 | 31618 |
| Base 9 | 22279 | 22329 |
| Base 10 | 164510 | 164910 |
| Base 11 | 126611 | 126a11 |
| Base 12 | b5112 | b5512 |
| Base 13 | 99713 | 99b13 |
| Base 14 | 85714 | 85b14 |
| Base 15 | 74a15 | 74e15 |
| Base 16 | 66d16 | 67116 |