72373613 has 8 divisors (see below), whose sum is σ = 78047256. Its totient is φ = 66715200.

The previous prime is 72373597. The next prime is 72373619. The reversal of 72373613 is 31637327.

It can be written as a sum of positive squares in 4 ways, for example, as 157609 + 72216004 = 397^2 + 8498^2 .

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 72373613 - 2⁴ = 72373597 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 72373613.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72373619) 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, 7283 + ... + 14063.

It is an arithmetic number, because the mean of its divisors is an integer number (9755907).

Almost surely, 2^72373613 is an apocalyptic number.

It is an amenable number.

72373613 is a deficient number, since it is larger than the sum of its proper divisors (5673643).

72373613 is a wasteful number, since it uses less digits than its factorization.

72373613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7615.

The product of its digits is 15876, while the sum is 32.

The square root of 72373613 is about 8507.2682454475. The cubic root of 72373613 is about 416.7351034965.

The spelling of 72373613 in words is "seventy-two million, three hundred seventy-three thousand, six hundred thirteen".