72576529 has 4 divisors (see below), whose sum is σ = 72676276. Its totient is φ = 72476784.

The previous prime is 72576509. The next prime is 72576533. The reversal of 72576529 is 92567527.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 92567527 = 13 ⋅7120579.

It can be written as a sum of positive squares in 2 ways, for example, as 31102929 + 41473600 = 5577^2 + 6440^2 .

It is a cyclic number.

It is not a de Polignac number, because 72576529 - 2⁷ = 72576401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72576509) 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, 48774 + ... + 50239.

It is an arithmetic number, because the mean of its divisors is an integer number (18169069).

Almost surely, 2^72576529 is an apocalyptic number.

It is an amenable number.

72576529 is a deficient number, since it is larger than the sum of its proper divisors (99747).

72576529 is an equidigital number, since it uses as much as digits as its factorization.

72576529 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99746.

The product of its digits is 264600, while the sum is 43.

The square root of 72576529 is about 8519.1859352875. The cubic root of 72576529 is about 417.1242108419.

The spelling of 72576529 in words is "seventy-two million, five hundred seventy-six thousand, five hundred twenty-nine".