86344631 has 4 divisors (see below), whose sum is σ = 86376000. Its totient is φ = 86313264.

The previous prime is 86344549. The next prime is 86344663. The reversal of 86344631 is 13644368.

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 86344631 - 2¹⁸ = 86082487 is a prime.

It is a super-2 number, since 2×86344631² = 14910790605052322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 86344591 and 86344600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86344681) 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, 11111 + ... + 17208.

It is an arithmetic number, because the mean of its divisors is an integer number (21594000).

Almost surely, 2^86344631 is an apocalyptic number.

86344631 is a deficient number, since it is larger than the sum of its proper divisors (31369).

86344631 is a wasteful number, since it uses less digits than its factorization.

86344631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31368.

The product of its digits is 41472, while the sum is 35.

The square root of 86344631 is about 9292.1811755906. The cubic root of 86344631 is about 441.9893239438.

Adding to 86344631 its reverse (13644368), we get a palindrome (99988999).

The spelling of 86344631 in words is "eighty-six million, three hundred forty-four thousand, six hundred thirty-one".