86172942 has 16 divisors (see below), whose sum is σ = 181416960. Its totient is φ = 27212472.

The previous prime is 86172941. The next prime is 86172943. The reversal of 86172942 is 24927168.

It is an interprime number because it is at equal distance from previous prime (86172941) and next prime (86172943).

It is a self number, because there is not a number n which added to its sum of digits gives 86172942.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86172941) 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, 377838 + ... + 378065.

It is an arithmetic number, because the mean of its divisors is an integer number (11338560).

Almost surely, 2^86172942 is an apocalyptic number.

86172942 is an abundant number, since it is smaller than the sum of its proper divisors (95244018).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

86172942 is a wasteful number, since it uses less digits than its factorization.

86172942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 755927.

The product of its digits is 48384, while the sum is 39.

The square root of 86172942 is about 9282.9382201973. The cubic root of 86172942 is about 441.6961767553.

The spelling of 86172942 in words is "eighty-six million, one hundred seventy-two thousand, nine hundred forty-two".