86648631 has 4 divisors (see below), whose sum is σ = 115531512. Its totient is φ = 57765752.

The previous prime is 86648623. The next prime is 86648633. The reversal of 86648631 is 13684668.

It is a happy number.

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 86648631 - 2³ = 86648623 is a prime.

It is a super-2 number, since 2×86648631² = 15015970508348322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86648633) 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, 14441436 + ... + 14441441.

It is an arithmetic number, because the mean of its divisors is an integer number (28882878).

Almost surely, 2^86648631 is an apocalyptic number.

86648631 is a deficient number, since it is larger than the sum of its proper divisors (28882881).

86648631 is a wasteful number, since it uses less digits than its factorization.

86648631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28882880.

The product of its digits is 165888, while the sum is 42.

The square root of 86648631 is about 9308.5246414241. The cubic root of 86648631 is about 442.5074313285.

The spelling of 86648631 in words is "eighty-six million, six hundred forty-eight thousand, six hundred thirty-one".