| Prime Factorization |
11 x 181 |
| Divisors |
1, 11, 181, 1991 |
| Count of divisors |
4 |
| Sum of divisors |
2184 |
| Previous integer |
1990 |
| Next integer |
1992 |
| Is prime? |
NO |
| Previous prime |
1987 |
| Next prime |
1993 |
| 1991st prime number |
↻ calculating, please wait |
| Is a Fibonacci number? |
NO |
| Zeckendorf representation |
1597 + 377 + 13 + 3 + 1 |
| Is a Pell number? |
NO |
| Is a regular number? |
NO |
| Is a perfect number? |
NO |
| Is a perfect square number? |
NO |
| Is a perfect cube number? |
NO |
| Is power of 2? |
NO |
| Is power of 3? |
NO |
| Square 19912 |
3964081 |
| Square root √1991 |
44.620623034646 |
| Cube 19913 |
7892485271 |
| Cubic root ∛1991 |
12.580283263893 |
| Natural logarithm |
7.5963923040642 |
| Decimal logarithm |
3.2990712600274 |