72235123 has 4 divisors (see below), whose sum is σ = 72453688. Its totient is φ = 72016560.

The previous prime is 72235069. The next prime is 72235127. The reversal of 72235123 is 32153227.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 72235123 - 2⁹ = 72234611 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72235127) 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, 108786 + ... + 109447.

It is an arithmetic number, because the mean of its divisors is an integer number (18113422).

Almost surely, 2^72235123 is an apocalyptic number.

72235123 is a deficient number, since it is larger than the sum of its proper divisors (218565).

72235123 is a wasteful number, since it uses less digits than its factorization.

72235123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218564.

The product of its digits is 2520, while the sum is 25.

The square root of 72235123 is about 8499.1248372994. The cubic root of 72235123 is about 416.4691202936.

The spelling of 72235123 in words is "seventy-two million, two hundred thirty-five thousand, one hundred twenty-three".