85668479 has 4 divisors (see below), whose sum is σ = 92258376. Its totient is φ = 79078584.

The previous prime is 85668439. The next prime is 85668481. The reversal of 85668479 is 97486658.

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

It is a de Polignac number, because none of the positive numbers 2^k-85668479 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 85668479.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85668409) 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, 3294929 + ... + 3294954.

It is an arithmetic number, because the mean of its divisors is an integer number (23064594).

Almost surely, 2^85668479 is an apocalyptic number.

85668479 is a deficient number, since it is larger than the sum of its proper divisors (6589897).

85668479 is a wasteful number, since it uses less digits than its factorization.

85668479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6589896.

The product of its digits is 2903040, while the sum is 53.

The square root of 85668479 is about 9255.7268218115. The cubic root of 85668479 is about 440.8325816274.

The spelling of 85668479 in words is "eighty-five million, six hundred sixty-eight thousand, four hundred seventy-nine".