72510539 has 2 divisors, whose sum is σ = 72510540. Its totient is φ = 72510538.

The previous prime is 72510521. The next prime is 72510553. The reversal of 72510539 is 93501527.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72510539 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (72510569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36255269 + 36255270.

It is an arithmetic number, because the mean of its divisors is an integer number (36255270).

Almost surely, 2^72510539 is an apocalyptic number.

72510539 is a deficient number, since it is larger than the sum of its proper divisors (1).

72510539 is an equidigital number, since it uses as much as digits as its factorization.

72510539 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9450, while the sum is 32.

The square root of 72510539 is about 8515.3120318635. The cubic root of 72510539 is about 416.9977495101.

The spelling of 72510539 in words is "seventy-two million, five hundred ten thousand, five hundred thirty-nine".