72249579 has 12 divisors (see below), whose sum is σ = 104458536. Its totient is φ = 48121152.

The previous prime is 72249539. The next prime is 72249581. The reversal of 72249579 is 97594227.

72249579 is a `hidden beast` number, since 72 + 2 + 4 + 9 + 579 = 666.

It is not a de Polignac number, because 72249579 - 2⁸ = 72249323 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72249539) 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, 8419 + ... + 14675.

It is an arithmetic number, because the mean of its divisors is an integer number (8704878).

Almost surely, 2^72249579 is an apocalyptic number.

72249579 is a deficient number, since it is larger than the sum of its proper divisors (32208957).

72249579 is a wasteful number, since it uses less digits than its factorization.

72249579 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7546 (or 7543 counting only the distinct ones).

The product of its digits is 317520, while the sum is 45.

The square root of 72249579 is about 8499.9752352580. The cubic root of 72249579 is about 416.4969002977.

The spelling of 72249579 in words is "seventy-two million, two hundred forty-nine thousand, five hundred seventy-nine".