86172869 has 4 divisors (see below), whose sum is σ = 86293440. Its totient is φ = 86052300.

The previous prime is 86172829. The next prime is 86172887. The reversal of 86172869 is 96827168.

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 86172869 - 2⁸ = 86172613 is a prime.

It is a super-2 number, since 2×86172869² = 14851526703382322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86172829) 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, 59207 + ... + 60644.

It is an arithmetic number, because the mean of its divisors is an integer number (21573360).

Almost surely, 2^86172869 is an apocalyptic number.

It is an amenable number.

86172869 is a deficient number, since it is larger than the sum of its proper divisors (120571).

86172869 is a wasteful number, since it uses less digits than its factorization.

86172869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120570.

The product of its digits is 290304, while the sum is 47.

The square root of 86172869 is about 9282.9342882517. The cubic root of 86172869 is about 441.6960520301.

The spelling of 86172869 in words is "eighty-six million, one hundred seventy-two thousand, eight hundred sixty-nine".