72158979 has 32 divisors (see below), whose sum is σ = 105871360. Its totient is φ = 43545600.

The previous prime is 72158971. The next prime is 72159001. The reversal of 72158979 is 97985127.

It is not a de Polignac number, because 72158979 - 2³ = 72158971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72158971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 171189 + ... + 171609.

It is an arithmetic number, because the mean of its divisors is an integer number (3308480).

Almost surely, 2^72158979 is an apocalyptic number.

72158979 is a deficient number, since it is larger than the sum of its proper divisors (33712381).

72158979 is a wasteful number, since it uses less digits than its factorization.

72158979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 571.

The product of its digits is 317520, while the sum is 48.

The square root of 72158979 is about 8494.6441361601. The cubic root of 72158979 is about 416.3227336401.

It can be divided in two parts, 72158 and 979, that added together give a palindrome (73137).

The spelling of 72158979 in words is "seventy-two million, one hundred fifty-eight thousand, nine hundred seventy-nine".