72996313 has 4 divisors (see below), whose sum is σ = 78611428. Its totient is φ = 67381200.

The previous prime is 72996293. The next prime is 72996323. The reversal of 72996313 is 31369927.

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 16024009 + 56972304 = 4003^2 + 7548^2 .

It is a cyclic number.

It is not a de Polignac number, because 72996313 - 2⁵ = 72996281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72996323) 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, 2807538 + ... + 2807563.

It is an arithmetic number, because the mean of its divisors is an integer number (19652857).

Almost surely, 2^72996313 is an apocalyptic number.

It is an amenable number.

72996313 is a deficient number, since it is larger than the sum of its proper divisors (5615115).

72996313 is a wasteful number, since it uses less digits than its factorization.

72996313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5615114.

The product of its digits is 61236, while the sum is 40.

The square root of 72996313 is about 8543.7879772382. The cubic root of 72996313 is about 417.9268833445.

The spelling of 72996313 in words is "seventy-two million, nine hundred ninety-six thousand, three hundred thirteen".