85564679 has 4 divisors (see below), whose sum is σ = 85810200. Its totient is φ = 85319160.

The previous prime is 85564667. The next prime is 85564693. The reversal of 85564679 is 97646558.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97646558 = 2 ⋅48823279.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85564679 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 (85564649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 122237 + ... + 122934.

It is an arithmetic number, because the mean of its divisors is an integer number (21452550).

Almost surely, 2^85564679 is an apocalyptic number.

85564679 is a deficient number, since it is larger than the sum of its proper divisors (245521).

85564679 is a wasteful number, since it uses less digits than its factorization.

85564679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245520.

The product of its digits is 1814400, while the sum is 50.

The square root of 85564679 is about 9250.1177830339. The cubic root of 85564679 is about 440.6544651020.

The spelling of 85564679 in words is "eighty-five million, five hundred sixty-four thousand, six hundred seventy-nine".