72979579 has 4 divisors (see below), whose sum is σ = 74532384. Its totient is φ = 71426776.

The previous prime is 72979547. The next prime is 72979591. The reversal of 72979579 is 97597927.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 72979579 - 2⁵ = 72979547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72979279) 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, 776332 + ... + 776425.

It is an arithmetic number, because the mean of its divisors is an integer number (18633096).

Almost surely, 2^72979579 is an apocalyptic number.

72979579 is a deficient number, since it is larger than the sum of its proper divisors (1552805).

72979579 is a wasteful number, since it uses less digits than its factorization.

72979579 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1552804.

The product of its digits is 2500470, while the sum is 55.

The square root of 72979579 is about 8542.8086130967. The cubic root of 72979579 is about 417.8949450969.

It can be divided in two parts, 729 and 79579, that added together give a palindrome (80308).

The spelling of 72979579 in words is "seventy-two million, nine hundred seventy-nine thousand, five hundred seventy-nine".