82591163 has 4 divisors (see below), whose sum is σ = 82797528. Its totient is φ = 82384800.

The previous prime is 82591139. The next prime is 82591189. The reversal of 82591163 is 36119528.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 82591163 - 2¹⁸ = 82329019 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82591123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102581 + ... + 103382.

It is an arithmetic number, because the mean of its divisors is an integer number (20699382).

Almost surely, 2^82591163 is an apocalyptic number.

82591163 is a deficient number, since it is larger than the sum of its proper divisors (206365).

82591163 is a wasteful number, since it uses less digits than its factorization.

82591163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206364.

The product of its digits is 12960, while the sum is 35.

The square root of 82591163 is about 9087.9680347149. The cubic root of 82591163 is about 435.4896727361.

The spelling of 82591163 in words is "eighty-two million, five hundred ninety-one thousand, one hundred sixty-three".