Compare 1381 vs 1388
| Property | 1381 | 1388 |
|---|---|---|
| Type | prime | composite number |
| Unique factors | 1 | 2 |
| Total factors | 1 | 3 |
| Prime factorization | 13811 | 22 × 3471 |
| Prime factorization | 1381 | 2 × 2 × 347 |
| Divisors count | 2 | 6 |
| Divisors | 1, 1381 | 1, 2, 4, 347, 694, 1388 |
| Number of properties | 7 | 0 |
| Additive primes | 122nd | |
| Chen primes | 144th | |
| Emirps | 64th | |
| Isolated primes | 130th | |
| Long primes | 86th | |
| Primes | 221st | |
| Pythagorean primes | 109th | |
| Roman numberals | MCCCLXXXI | MCCCLXXXVIII |
| Base 2 | 101011001012 | 101011011002 |
| Base 3 | 12200113 | 12201023 |
| Base 4 | 1112114 | 1112304 |
| Base 5 | 210115 | 210235 |
| Base 6 | 102216 | 102326 |
| Base 7 | 40127 | 40227 |
| Base 8 | 25458 | 25548 |
| Base 9 | 18049 | 18129 |
| Base 10 | 138110 | 138810 |
| Base 11 | 104611 | 105211 |
| Base 12 | 97112 | 97812 |
| Base 13 | 82313 | 82a13 |
| Base 14 | 70914 | 71214 |
| Base 15 | 62115 | 62815 |
| Base 16 | 56516 | 56c16 |