Compare 2009 vs 2018
| Property | 2009 | 2018 |
|---|---|---|
| Type | composite number | semiprime |
| Unique factors | 2 | 2 |
| Total factors | 3 | 2 |
| Prime factorization | 72 × 411 | 21 × 10091 |
| Prime factorization | 7 × 7 × 41 | 2 × 1009 |
| Divisors count | 6 | 4 |
| Divisors | 1, 7, 41, 49, 287, 2009 | 1, 2, 1009, 2018 |
| Number of properties | 0 | 1 |
| Semiprimes | 579th | |
| Roman numberals | MMIX | MMXVIII |
| Base 2 | 111110110012 | 111111000102 |
| Base 3 | 22021023 | 22022023 |
| Base 4 | 1331214 | 1332024 |
| Base 5 | 310145 | 310335 |
| Base 6 | 131456 | 132026 |
| Base 7 | 56007 | 56127 |
| Base 8 | 37318 | 37428 |
| Base 9 | 26729 | 26829 |
| Base 10 | 200910 | 201810 |
| Base 11 | 156711 | 157511 |
| Base 12 | 11b512 | 120212 |
| Base 13 | bb713 | bc313 |
| Base 14 | a3714 | a4214 |
| Base 15 | 8de15 | 8e815 |
| Base 16 | 7d916 | 7e216 |