72394613 has 4 divisors (see below), whose sum is σ = 72713760. Its totient is φ = 72075468.

The previous prime is 72394601. The next prime is 72394627. The reversal of 72394613 is 31649327.

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, and also an emirpimes, since its reverse is a distinct semiprime: 31649327 = 139 ⋅227693.

It is a cyclic number.

It is not a de Polignac number, because 72394613 - 2¹² = 72390517 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 (72394633) 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, 159233 + ... + 159686.

It is an arithmetic number, because the mean of its divisors is an integer number (18178440).

Almost surely, 2^72394613 is an apocalyptic number.

It is an amenable number.

72394613 is a deficient number, since it is larger than the sum of its proper divisors (319147).

72394613 is a wasteful number, since it uses less digits than its factorization.

72394613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319146.

The product of its digits is 27216, while the sum is 35.

The square root of 72394613 is about 8508.5023946638. The cubic root of 72394613 is about 416.7754063569.

The spelling of 72394613 in words is "seventy-two million, three hundred ninety-four thousand, six hundred thirteen".