72658979 has 4 divisors (see below), whose sum is σ = 72789984. Its totient is φ = 72527976.

The previous prime is 72658967. The next prime is 72658987. The reversal of 72658979 is 97985627.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97985627 = 883 ⋅110969.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72658979 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 72658979.

It is not an unprimeable number, because it can be changed into a prime (72658279) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64667 + ... + 65780.

It is an arithmetic number, because the mean of its divisors is an integer number (18197496).

Almost surely, 2^72658979 is an apocalyptic number.

72658979 is a deficient number, since it is larger than the sum of its proper divisors (131005).

72658979 is a wasteful number, since it uses less digits than its factorization.

72658979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131004.

The product of its digits is 1905120, while the sum is 53.

The square root of 72658979 is about 8524.0236391038. The cubic root of 72658979 is about 417.2821079670.

It can be divided in two parts, 72658 and 979, that added together give a palindrome (73637).

The spelling of 72658979 in words is "seventy-two million, six hundred fifty-eight thousand, nine hundred seventy-nine".