72564479 has 8 divisors (see below), whose sum is σ = 78276912. Its totient is φ = 66870720.

The previous prime is 72564469. The next prime is 72564487. The reversal of 72564479 is 97446527.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72564479 is a prime.

It is a super-2 number, since 2×72564479² = 10531207225082882, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72564469) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4019 + ... + 12699.

It is an arithmetic number, because the mean of its divisors is an integer number (9784614).

Almost surely, 2^72564479 is an apocalyptic number.

72564479 is a deficient number, since it is larger than the sum of its proper divisors (5712433).

72564479 is a wasteful number, since it uses less digits than its factorization.

72564479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9337.

The product of its digits is 423360, while the sum is 44.

The square root of 72564479 is about 8518.4786787313. The cubic root of 72564479 is about 417.1011242921.

The spelling of 72564479 in words is "seventy-two million, five hundred sixty-four thousand, four hundred seventy-nine".