72510709 has 8 divisors (see below), whose sum is σ = 73608192. Its totient is φ = 71418720.

The previous prime is 72510689. The next prime is 72510721. The reversal of 72510709 is 90701527.

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 72510709 - 2⁵ = 72510677 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 (72510749) 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, 30649 + ... + 32929.

It is an arithmetic number, because the mean of its divisors is an integer number (9201024).

Almost surely, 2^72510709 is an apocalyptic number.

It is an amenable number.

72510709 is a deficient number, since it is larger than the sum of its proper divisors (1097483).

72510709 is a wasteful number, since it uses less digits than its factorization.

72510709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2747.

The product of its (nonzero) digits is 4410, while the sum is 31.

The square root of 72510709 is about 8515.3220138759. The cubic root of 72510709 is about 416.9980753917.

The spelling of 72510709 in words is "seventy-two million, five hundred ten thousand, seven hundred nine".