86389631 has 4 divisors (see below), whose sum is σ = 91471392. Its totient is φ = 81307872.

The previous prime is 86389609. The next prime is 86389669. The reversal of 86389631 is 13698368.

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

It is not a de Polignac number, because 86389631 - 2¹⁰ = 86388607 is a prime.

It is a super-2 number, since 2×86389631² = 14926336688632322, 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 (86389691) 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, 2540855 + ... + 2540888.

It is an arithmetic number, because the mean of its divisors is an integer number (22867848).

Almost surely, 2^86389631 is an apocalyptic number.

86389631 is a deficient number, since it is larger than the sum of its proper divisors (5081761).

86389631 is a wasteful number, since it uses less digits than its factorization.

86389631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5081760.

The product of its digits is 186624, while the sum is 44.

The square root of 86389631 is about 9294.6022507690. The cubic root of 86389631 is about 442.0660940726.

The spelling of 86389631 in words is "eighty-six million, three hundred eighty-nine thousand, six hundred thirty-one".