72313239 has 8 divisors (see below), whose sum is σ = 96710272. Its totient is φ = 48062520.

The previous prime is 72313187. The next prime is 72313247. The reversal of 72313239 is 93231327.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 72313239 - 2¹¹ = 72311191 is a prime.

It is a super-2 number, since 2×72313239² = 10458409069342242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72313139) 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, 35419 + ... + 37404.

It is an arithmetic number, because the mean of its divisors is an integer number (12088784).

Almost surely, 2^72313239 is an apocalyptic number.

72313239 is a deficient number, since it is larger than the sum of its proper divisors (24397033).

72313239 is a wasteful number, since it uses less digits than its factorization.

72313239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73157.

The product of its digits is 6804, while the sum is 30.

The square root of 72313239 is about 8503.7191275347. The cubic root of 72313239 is about 416.6191912486.

The spelling of 72313239 in words is "seventy-two million, three hundred thirteen thousand, two hundred thirty-nine".