Compare 8191 vs 9181
| Property | 8191 | 9181 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 81911 | 91811 |
| Prime factorization | 8191 | 9181 |
| Divisors count | 2 | 2 |
| Divisors | 1, 8191 | 1, 9181 |
| Number of properties | 10 | 7 |
| Additive primes | 503rd | 550th |
| Chen primes | 552nd | 594th |
| Class 1+ primes | 25th | |
| Harmonic primes | 377th | |
| Isolated primes | 675th | 755th |
| Lucky primes | 186th | 197th |
| Mersenne primes | 5th | |
| Pierpont primes of the 2nd kind | 25th | |
| Primes | 1028th | 1138th |
| Pythagorean primes | 566th | |
| Sexy primes (1st member) | 383rd | |
| Solinas primes | 76th | |
| Roman numberals | ||
| Base 2 | 11111111111112 | 100011110111012 |
| Base 3 | 1020201013 | 1101210013 |
| Base 4 | 13333334 | 20331314 |
| Base 5 | 2302315 | 2432115 |
| Base 6 | 1015316 | 1103016 |
| Base 7 | 326117 | 355247 |
| Base 8 | 177778 | 217358 |
| Base 9 | 122119 | 135319 |
| Base 10 | 819110 | 918110 |
| Base 11 | 617711 | 699711 |
| Base 12 | 48a712 | 539112 |
| Base 13 | 396113 | 424313 |
| Base 14 | 2db114 | 34bb14 |
| Base 15 | 266115 | 2ac115 |
| Base 16 | 1fff16 | 23dd16 |