72765223 has 4 divisors (see below), whose sum is σ = 73069920. Its totient is φ = 72460528.

The previous prime is 72765211. The next prime is 72765257. The reversal of 72765223 is 32256727.

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 72765223 - 2⁵ = 72765191 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72765293) 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, 151990 + ... + 152467.

It is an arithmetic number, because the mean of its divisors is an integer number (18267480).

Almost surely, 2^72765223 is an apocalyptic number.

72765223 is a deficient number, since it is larger than the sum of its proper divisors (304697).

72765223 is a wasteful number, since it uses less digits than its factorization.

72765223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304696.

The product of its digits is 35280, while the sum is 34.

The square root of 72765223 is about 8530.2533960018. The cubic root of 72765223 is about 417.4853961211.

The spelling of 72765223 in words is "seventy-two million, seven hundred sixty-five thousand, two hundred twenty-three".