72996613 has 4 divisors (see below), whose sum is σ = 76838560. Its totient is φ = 69154668.

The previous prime is 72996601. The next prime is 72996619. The reversal of 72996613 is 31669927.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72996613 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 72996613.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72996619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1920945 + ... + 1920982.

It is an arithmetic number, because the mean of its divisors is an integer number (19209640).

Almost surely, 2^72996613 is an apocalyptic number.

It is an amenable number.

72996613 is a deficient number, since it is larger than the sum of its proper divisors (3841947).

72996613 is a wasteful number, since it uses less digits than its factorization.

72996613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3841946.

The product of its digits is 122472, while the sum is 43.

The square root of 72996613 is about 8543.8055338356. The cubic root of 72996613 is about 417.9274558752.

The spelling of 72996613 in words is "seventy-two million, nine hundred ninety-six thousand, six hundred thirteen".