86172039 has 8 divisors (see below), whose sum is σ = 127662320. Its totient is φ = 57448008.

The previous prime is 86172029. The next prime is 86172059. The reversal of 86172039 is 93027168.

86172039 is a `hidden beast` number, since 8 + 617 + 2 + 0 + 39 = 666.

It is not a de Polignac number, because 86172039 - 2¹⁷ = 86040967 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 86171994 and 86172012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86172019) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1595752 + ... + 1595805.

It is an arithmetic number, because the mean of its divisors is an integer number (15957790).

Almost surely, 2^86172039 is an apocalyptic number.

86172039 is a deficient number, since it is larger than the sum of its proper divisors (41490281).

86172039 is a wasteful number, since it uses less digits than its factorization.

86172039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3191566 (or 3191560 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 86172039 is about 9282.8895824522. The cubic root of 86172039 is about 441.6946339159.

It can be divided in two parts, 861 and 72039, that added together give a square (72900 = 270²).

The spelling of 86172039 in words is "eighty-six million, one hundred seventy-two thousand, thirty-nine".