72715579 has 6 divisors (see below), whose sum is σ = 77244884. Its totient is φ = 68437920.

The previous prime is 72715571. The next prime is 72715589. The reversal of 72715579 is 97551727.

It is not a de Polignac number, because 72715579 - 2³ = 72715571 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72715571) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 125517 + ... + 126094.

Almost surely, 2^72715579 is an apocalyptic number.

72715579 is a deficient number, since it is larger than the sum of its proper divisors (4529305).

72715579 is a wasteful number, since it uses less digits than its factorization.

72715579 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251645 (or 251628 counting only the distinct ones).

The product of its digits is 154350, while the sum is 43.

The square root of 72715579 is about 8527.3430211291. The cubic root of 72715579 is about 417.3904315245.

The spelling of 72715579 in words is "seventy-two million, seven hundred fifteen thousand, five hundred seventy-nine".