72579897 has 24 divisors (see below), whose sum is σ = 116549888. Its totient is φ = 43221600.

The previous prime is 72579889. The next prime is 72579917. The reversal of 72579897 is 79897527.

It is not a de Polignac number, because 72579897 - 2³ = 72579889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72579887) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6379 + ... + 13632.

Almost surely, 2^72579897 is an apocalyptic number.

It is an amenable number.

72579897 is a deficient number, since it is larger than the sum of its proper divisors (43969991).

72579897 is a wasteful number, since it uses less digits than its factorization.

72579897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20061 (or 20058 counting only the distinct ones).

The product of its digits is 2222640, while the sum is 54.

The square root of 72579897 is about 8519.3836044634. The cubic root of 72579897 is about 417.1306631235.

The spelling of 72579897 in words is "seventy-two million, five hundred seventy-nine thousand, eight hundred ninety-seven".