72576013 has 4 divisors (see below), whose sum is σ = 72593820. Its totient is φ = 72558208.

The previous prime is 72576001. The next prime is 72576041. The reversal of 72576013 is 31067527.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31067527 = 19 ⋅1635133.

It can be written as a sum of positive squares in 2 ways, for example, as 27175369 + 45400644 = 5213^2 + 6738^2 .

It is a cyclic number.

It is not a de Polignac number, because 72576013 - 2¹⁷ = 72444941 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72576073) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 573 + ... + 12061.

It is an arithmetic number, because the mean of its divisors is an integer number (18148455).

Almost surely, 2^72576013 is an apocalyptic number.

It is an amenable number.

72576013 is a deficient number, since it is larger than the sum of its proper divisors (17807).

72576013 is a wasteful number, since it uses less digits than its factorization.

72576013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17806.

The product of its (nonzero) digits is 8820, while the sum is 31.

The square root of 72576013 is about 8519.1556506499. The cubic root of 72576013 is about 417.1232222918.

The spelling of 72576013 in words is "seventy-two million, five hundred seventy-six thousand, thirteen".