86172863 has 16 divisors (see below), whose sum is σ = 100949760. Its totient is φ = 72033216.

The previous prime is 86172829. The next prime is 86172887. The reversal of 86172863 is 36827168.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 86172863 - 2⁶ = 86172799 is a prime.

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 86172863.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86171863) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55820 + ... + 57342.

It is an arithmetic number, because the mean of its divisors is an integer number (6309360).

Almost surely, 2^86172863 is an apocalyptic number.

86172863 is a deficient number, since it is larger than the sum of its proper divisors (14776897).

86172863 is a wasteful number, since it uses less digits than its factorization.

86172863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1726.

The product of its digits is 96768, while the sum is 41.

The square root of 86172863 is about 9282.9339650781. The cubic root of 86172863 is about 441.6960417787.

The spelling of 86172863 in words is "eighty-six million, one hundred seventy-two thousand, eight hundred sixty-three".