72192313 has 4 divisors (see below), whose sum is σ = 73871248. Its totient is φ = 70513380.

The previous prime is 72192301. The next prime is 72192371. The reversal of 72192313 is 31329127.

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: 31329127 = 31 ⋅1010617.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72192313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72195313) 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, 839403 + ... + 839488.

It is an arithmetic number, because the mean of its divisors is an integer number (18467812).

Almost surely, 2^72192313 is an apocalyptic number.

It is an amenable number.

72192313 is a deficient number, since it is larger than the sum of its proper divisors (1678935).

72192313 is a wasteful number, since it uses less digits than its factorization.

72192313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1678934.

The product of its digits is 2268, while the sum is 28.

The square root of 72192313 is about 8496.6059694445. The cubic root of 72192313 is about 416.3868308404.

The spelling of 72192313 in words is "seventy-two million, one hundred ninety-two thousand, three hundred thirteen".