86163979 has 12 divisors (see below), whose sum is σ = 95156712. Its totient is φ = 77960960.

The previous prime is 86163971. The next prime is 86163983. The reversal of 86163979 is 97936168.

It is not a de Polignac number, because 86163979 - 2³ = 86163971 is a prime.

It is a super-2 number, since 2×86163979² = 14848462554224882, 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 (86163971) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25899 + ... + 29035.

It is an arithmetic number, because the mean of its divisors is an integer number (7929726).

Almost surely, 2^86163979 is an apocalyptic number.

86163979 is a deficient number, since it is larger than the sum of its proper divisors (8992733).

86163979 is a wasteful number, since it uses less digits than its factorization.

86163979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3386 (or 3375 counting only the distinct ones).

The product of its digits is 489888, while the sum is 49.

The square root of 86163979 is about 9282.4554402378. The cubic root of 86163979 is about 441.6808623577.

The spelling of 86163979 in words is "eighty-six million, one hundred sixty-three thousand, nine hundred seventy-nine".