86172111 has 6 divisors (see below), whose sum is σ = 124470840. Its totient is φ = 57448068.

The previous prime is 86172091. The next prime is 86172113. The reversal of 86172111 is 11127168.

It is a de Polignac number, because none of the positive numbers 2^k-86172111 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86172113) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4787331 + ... + 4787348.

It is an arithmetic number, because the mean of its divisors is an integer number (20745140).

Almost surely, 2^86172111 is an apocalyptic number.

86172111 is a deficient number, since it is larger than the sum of its proper divisors (38298729).

86172111 is a wasteful number, since it uses less digits than its factorization.

86172111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9574685 (or 9574682 counting only the distinct ones).

The product of its digits is 672, while the sum is 27.

The square root of 86172111 is about 9282.8934605542. The cubic root of 86172111 is about 441.6947569334.

Adding to 86172111 its reverse (11127168), we get a palindrome (97299279).

The spelling of 86172111 in words is "eighty-six million, one hundred seventy-two thousand, one hundred eleven".