Compare 19937 vs 19991
| Property | 19937 | 19991 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 199371 | 199911 |
| Prime factorization | 19937 | 19991 |
| Divisors count | 2 | 2 |
| Divisors | 1, 19937 | 1, 19991 |
| Number of properties | 6 | 9 |
| Additive primes | 1047th | 1049th |
| Chen primes | 1108th | 1111th |
| Harmonic primes | 820th | |
| Isolated primes | 1575th | |
| Palindromic primes | 46th | |
| Primes | 2254th | 2260th |
| Prime triplets (1st member) | 168th | |
| Pythagorean primes | 1120th | |
| Sexy primes (1st member) | 693rd | |
| Sophie germain primes | 326th | |
| Twin primes (1st member) | 342nd | |
| Ulam primes | 164th | |
| Roman numberals | ||
| Base 2 | 1001101111000012 | 1001110000101112 |
| Base 3 | 10001001023 | 10001021023 |
| Base 4 | 103132014 | 103201134 |
| Base 5 | 11142225 | 11144315 |
| Base 6 | 2321456 | 2323156 |
| Base 7 | 1120617 | 1121667 |
| Base 8 | 467418 | 470278 |
| Base 9 | 303129 | 303729 |
| Base 10 | 1993710 | 1999110 |
| Base 11 | 13a8511 | 1402411 |
| Base 12 | b65512 | b69b12 |
| Base 13 | 90c813 | 913a13 |
| Base 14 | 73a114 | 73dd14 |
| Base 15 | 5d9215 | 5dcb15 |
| Base 16 | 4de116 | 4e1716 |