86864621 has 4 divisors (see below), whose sum is σ = 86887200. Its totient is φ = 86842044.

The previous prime is 86864597. The next prime is 86864627. The reversal of 86864621 is 12646868.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 86864621 - 2²² = 82670317 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86864627) 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, 3911 + ... + 13748.

It is an arithmetic number, because the mean of its divisors is an integer number (21721800).

Almost surely, 2^86864621 is an apocalyptic number.

It is an amenable number.

86864621 is a deficient number, since it is larger than the sum of its proper divisors (22579).

86864621 is a wasteful number, since it uses less digits than its factorization.

86864621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22578.

The product of its digits is 110592, while the sum is 41.

The square root of 86864621 is about 9320.1191515989. The cubic root of 86864621 is about 442.8748072980.

The spelling of 86864621 in words is "eighty-six million, eight hundred sixty-four thousand, six hundred twenty-one".