86239631 has 4 divisors (see below), whose sum is σ = 86860200. Its totient is φ = 85619064.

The previous prime is 86239619. The next prime is 86239633. The reversal of 86239631 is 13693268.

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 86239631 - 2²⁶ = 19130767 is a prime.

It is a super-2 number, since 2×86239631² = 14874547910032322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86239633) 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, 310076 + ... + 310353.

It is an arithmetic number, because the mean of its divisors is an integer number (21715050).

Almost surely, 2^86239631 is an apocalyptic number.

86239631 is a deficient number, since it is larger than the sum of its proper divisors (620569).

86239631 is a wasteful number, since it uses less digits than its factorization.

86239631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 620568.

The product of its digits is 46656, while the sum is 38.

The square root of 86239631 is about 9286.5295455299. The cubic root of 86239631 is about 441.8100898554.

The spelling of 86239631 in words is "eighty-six million, two hundred thirty-nine thousand, six hundred thirty-one".