82911131 has 2 divisors, whose sum is σ = 82911132. Its totient is φ = 82911130.

The previous prime is 82911047. The next prime is 82911163. The reversal of 82911131 is 13111928.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-82911131 is a prime.

It is a super-2 number, since 2×82911131² = 13748511287398322, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 82911131.

It is not a weakly prime, because it can be changed into another prime (82911331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41455565 + 41455566.

It is an arithmetic number, because the mean of its divisors is an integer number (41455566).

Almost surely, 2^82911131 is an apocalyptic number.

82911131 is a deficient number, since it is larger than the sum of its proper divisors (1).

82911131 is an equidigital number, since it uses as much as digits as its factorization.

82911131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 432, while the sum is 26.

The square root of 82911131 is about 9105.5549528845. The cubic root of 82911131 is about 436.0513276694.

The spelling of 82911131 in words is "eighty-two million, nine hundred eleven thousand, one hundred thirty-one".