86631233 has 4 divisors (see below), whose sum is σ = 93295188. Its totient is φ = 79967280.

The previous prime is 86631211. The next prime is 86631239. The reversal of 86631233 is 33213668.

86631233 is an esthetic number in base 7, because in such base its adjacent digits differ by 1.

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

It can be written as a sum of positive squares in 2 ways, for example, as 22118209 + 64513024 = 4703^2 + 8032^2 .

It is a cyclic number.

It is not a de Polignac number, because 86631233 - 2⁸ = 86630977 is a prime.

It is a super-2 number, since 2×86631233² = 15009941062200578, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 86631233.

It is not an unprimeable number, because it can be changed into a prime (86631239) 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, 3331958 + ... + 3331983.

It is an arithmetic number, because the mean of its divisors is an integer number (23323797).

Almost surely, 2^86631233 is an apocalyptic number.

It is an amenable number.

86631233 is a deficient number, since it is larger than the sum of its proper divisors (6663955).

86631233 is a wasteful number, since it uses less digits than its factorization.

86631233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6663954.

The product of its digits is 15552, while the sum is 32.

The square root of 86631233 is about 9307.5900747723. The cubic root of 86631233 is about 442.4778126277.

The spelling of 86631233 in words is "eighty-six million, six hundred thirty-one thousand, two hundred thirty-three".