72504813 has 8 divisors (see below), whose sum is σ = 102359808. Its totient is φ = 45493184.

The previous prime is 72504811. The next prime is 72504821. The reversal of 72504813 is 31840527.

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 72504813 - 2¹ = 72504811 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72504811) 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, 710781 + ... + 710882.

It is an arithmetic number, because the mean of its divisors is an integer number (12794976).

Almost surely, 2^72504813 is an apocalyptic number.

It is an amenable number.

72504813 is a deficient number, since it is larger than the sum of its proper divisors (29854995).

72504813 is a wasteful number, since it uses less digits than its factorization.

72504813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1421683.

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 72504813 is about 8514.9758073643. The cubic root of 72504813 is about 416.9867727518.

The spelling of 72504813 in words is "seventy-two million, five hundred four thousand, eight hundred thirteen".