82564679 has 4 divisors (see below), whose sum is σ = 83695776. Its totient is φ = 81433584.

The previous prime is 82564673. The next prime is 82564681. The reversal of 82564679 is 97646528.

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 82564679 - 2¹⁶ = 82499143 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82564673) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 565439 + ... + 565584.

It is an arithmetic number, because the mean of its divisors is an integer number (20923944).

Almost surely, 2^82564679 is an apocalyptic number.

82564679 is a deficient number, since it is larger than the sum of its proper divisors (1131097).

82564679 is a wasteful number, since it uses less digits than its factorization.

82564679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1131096.

The product of its digits is 725760, while the sum is 47.

The square root of 82564679 is about 9086.5108264944. The cubic root of 82564679 is about 435.4431191619.

The spelling of 82564679 in words is "eighty-two million, five hundred sixty-four thousand, six hundred seventy-nine".