86739879 has 4 divisors (see below), whose sum is σ = 115653176. Its totient is φ = 57826584.

The previous prime is 86739869. The next prime is 86739881. The reversal of 86739879 is 97893768.

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

It is not a de Polignac number, because 86739879 - 2⁵ = 86739847 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 (86739839) 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, 14456644 + ... + 14456649.

It is an arithmetic number, because the mean of its divisors is an integer number (28913294).

Almost surely, 2^86739879 is an apocalyptic number.

86739879 is a deficient number, since it is larger than the sum of its proper divisors (28913297).

86739879 is a wasteful number, since it uses less digits than its factorization.

86739879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28913296.

The product of its digits is 4572288, while the sum is 57.

The square root of 86739879 is about 9313.4246655030. The cubic root of 86739879 is about 442.6627088448.

The spelling of 86739879 in words is "eighty-six million, seven hundred thirty-nine thousand, eight hundred seventy-nine".