72565979 has 8 divisors (see below), whose sum is σ = 78470208. Its totient is φ = 66843520.

The previous prime is 72565963. The next prime is 72565981. The reversal of 72565979 is 97956527.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 72565979 - 2⁴ = 72565963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72565939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44612 + ... + 46209.

It is an arithmetic number, because the mean of its divisors is an integer number (9808776).

Almost surely, 2^72565979 is an apocalyptic number.

72565979 is a deficient number, since it is larger than the sum of its proper divisors (5904229).

72565979 is a wasteful number, since it uses less digits than its factorization.

72565979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90885.

The product of its digits is 1190700, while the sum is 50.

The square root of 72565979 is about 8518.5667221664. The cubic root of 72565979 is about 417.1039982757.

The spelling of 72565979 in words is "seventy-two million, five hundred sixty-five thousand, nine hundred seventy-nine".