86390031 has 32 divisors (see below), whose sum is σ = 143797248. Its totient is φ = 44916480.

The previous prime is 86390023. The next prime is 86390041. The reversal of 86390031 is 13009368.

It is not a de Polignac number, because 86390031 - 2³ = 86390023 is a prime.

It is a super-2 number, since 2×86390031² = 14926474912361922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86390011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17155 + ... + 21611.

It is an arithmetic number, because the mean of its divisors is an integer number (4493664).

Almost surely, 2^86390031 is an apocalyptic number.

86390031 is a deficient number, since it is larger than the sum of its proper divisors (57407217).

86390031 is a wasteful number, since it uses less digits than its factorization.

86390031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4551.

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 86390031 is about 9294.6237686095. The cubic root of 86390031 is about 442.0667763542.

Adding to 86390031 its reverse (13009368), we get a palindrome (99399399).

The spelling of 86390031 in words is "eighty-six million, three hundred ninety thousand, thirty-one".