Compare 1981 vs 1994
| Property | 1981 | 1994 |
|---|---|---|
| Type | semiprime | semiprime |
| Unique factors | 2 | 2 |
| Total factors | 2 | 2 |
| Prime factorization | 71 × 2831 | 21 × 9971 |
| Prime factorization | 7 × 283 | 2 × 997 |
| Divisors count | 4 | 4 |
| Divisors | 1, 7, 283, 1981 | 1, 2, 997, 1994 |
| Number of properties | 1 | 1 |
| Semiprimes | 572nd | 577th |
| Roman numberals | MCMLXXXI | MCMXCIV |
| Base 2 | 111101111012 | 111110010102 |
| Base 3 | 22011013 | 22012123 |
| Base 4 | 1323314 | 1330224 |
| Base 5 | 304115 | 304345 |
| Base 6 | 131016 | 131226 |
| Base 7 | 55307 | 55467 |
| Base 8 | 36758 | 37128 |
| Base 9 | 26419 | 26559 |
| Base 10 | 198110 | 199410 |
| Base 11 | 154111 | 155311 |
| Base 12 | 119112 | 11a212 |
| Base 13 | b9513 | ba513 |
| Base 14 | a1714 | a2614 |
| Base 15 | 8c115 | 8ce15 |
| Base 16 | 7bd16 | 7ca16 |