82291291 has 2 divisors, whose sum is σ = 82291292. Its totient is φ = 82291290.

The previous prime is 82291289. The next prime is 82291331. The reversal of 82291291 is 19219228.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 82291291 - 2¹ = 82291289 is a prime.

Together with 82291289, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (82091291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41145645 + 41145646.

It is an arithmetic number, because the mean of its divisors is an integer number (41145646).

Almost surely, 2^82291291 is an apocalyptic number.

82291291 is a deficient number, since it is larger than the sum of its proper divisors (1).

82291291 is an equidigital number, since it uses as much as digits as its factorization.

82291291 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5184, while the sum is 34.

The square root of 82291291 is about 9071.4547344955. The cubic root of 82291291 is about 434.9619749208.

The spelling of 82291291 in words is "eighty-two million, two hundred ninety-one thousand, two hundred ninety-one".