85979863 has 4 divisors (see below), whose sum is σ = 91037520. Its totient is φ = 80922208.

The previous prime is 85979849. The next prime is 85979869. The reversal of 85979863 is 36897958.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85979863 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 (85979869) 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, 2528803 + ... + 2528836.

It is an arithmetic number, because the mean of its divisors is an integer number (22759380).

Almost surely, 2^85979863 is an apocalyptic number.

85979863 is a deficient number, since it is larger than the sum of its proper divisors (5057657).

85979863 is a wasteful number, since it uses less digits than its factorization.

85979863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5057656.

The product of its digits is 3265920, while the sum is 55.

The square root of 85979863 is about 9272.5327176559. The cubic root of 85979863 is about 441.3660420751.

The spelling of 85979863 in words is "eighty-five million, nine hundred seventy-nine thousand, eight hundred sixty-three".