Compare 191 vs 971
| Property | 191 | 971 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 1911 | 9711 |
| Prime factorization | 191 | 971 |
| Divisors count | 2 | 2 |
| Divisors | 1, 191 | 1, 971 |
| Number of properties | 16 | 11 |
| Additive primes | 24th | 87th |
| Chen primes | 34th | 112th |
| Class 1+ primes | 14th | 19th |
| Cousin primes (2nd member) | 41st | |
| Emirps | 34th | |
| Good primes | 16th | |
| Harmonic primes | 15th | |
| Isolated primes | 95th | |
| Long primes | 58th | |
| Palindromic primes | 10th | |
| Pierpont primes of the 2nd kind | 14th | 19th |
| Primes | 43rd | 164th |
| Prime quadruplets (1st member) | 4th | |
| Prime triplets (1st member) | 13th | |
| Sexy primes (1st member) | 25th | 72nd |
| Sexy prime triplets (1st member) | 28th | |
| Solinas primes | 25th | |
| Sophie germain primes | 15th | |
| Super primes | 14th | |
| Thabit primes | 6th | |
| Twin primes (1st member) | 14th | |
| Roman numberals | CXCI | CMLXXI |
| Base 2 | 101111112 | 11110010112 |
| Base 3 | 210023 | 10222223 |
| Base 4 | 23334 | 330234 |
| Base 5 | 12315 | 123415 |
| Base 6 | 5156 | 42556 |
| Base 7 | 3627 | 25557 |
| Base 8 | 2778 | 17138 |
| Base 9 | 2329 | 12889 |
| Base 10 | 19110 | 97110 |
| Base 11 | 16411 | 80311 |
| Base 12 | 13b12 | 68b12 |
| Base 13 | 11913 | 59913 |
| Base 14 | d914 | 4d514 |
| Base 15 | cb15 | 44b15 |
| Base 16 | bf16 | 3cb16 |