72364513 has 4 divisors (see below), whose sum is σ = 77931028. Its totient is φ = 66798000.

The previous prime is 72364507. The next prime is 72364517. The reversal of 72364513 is 31546327.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12271009 + 60093504 = 3503^2 + 7752^2 .

It is a cyclic number.

It is not a de Polignac number, because 72364513 - 2⁹ = 72364001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72364517) 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, 2783238 + ... + 2783263.

It is an arithmetic number, because the mean of its divisors is an integer number (19482757).

Almost surely, 2^72364513 is an apocalyptic number.

It is an amenable number.

72364513 is a deficient number, since it is larger than the sum of its proper divisors (5566515).

72364513 is a wasteful number, since it uses less digits than its factorization.

72364513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5566514.

The product of its digits is 15120, while the sum is 31.

The square root of 72364513 is about 8506.7333918491. The cubic root of 72364513 is about 416.7176365025.

The spelling of 72364513 in words is "seventy-two million, three hundred sixty-four thousand, five hundred thirteen".