72182923 has 4 divisors (see below), whose sum is σ = 72240640. Its totient is φ = 72125208.

The previous prime is 72182921. The next prime is 72182927. The reversal of 72182923 is 32928127.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32928127 = 139 ⋅236893.

It is a cyclic number.

It is not a de Polignac number, because 72182923 - 2¹ = 72182921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72182921) 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, 26940 + ... + 29497.

It is an arithmetic number, because the mean of its divisors is an integer number (18060160).

Almost surely, 2^72182923 is an apocalyptic number.

72182923 is a deficient number, since it is larger than the sum of its proper divisors (57717).

72182923 is a wasteful number, since it uses less digits than its factorization.

72182923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57716.

The product of its digits is 12096, while the sum is 34.

The square root of 72182923 is about 8496.0533778926. The cubic root of 72182923 is about 416.3687770167.

The spelling of 72182923 in words is "seventy-two million, one hundred eighty-two thousand, nine hundred twenty-three".