72747723 has 8 divisors (see below), whose sum is σ = 97639936. Its totient is φ = 48177000.

The previous prime is 72747691. The next prime is 72747733. The reversal of 72747723 is 32774727.

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

It is not a de Polignac number, because 72747723 - 2⁵ = 72747691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72747733) 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, 79843 + ... + 80748.

It is an arithmetic number, because the mean of its divisors is an integer number (12204992).

Almost surely, 2^72747723 is an apocalyptic number.

72747723 is a deficient number, since it is larger than the sum of its proper divisors (24892213).

72747723 is a wasteful number, since it uses less digits than its factorization.

72747723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160745.

The product of its digits is 115248, while the sum is 39.

The square root of 72747723 is about 8529.2275734676. The cubic root of 72747723 is about 417.4519250942.

The spelling of 72747723 in words is "seventy-two million, seven hundred forty-seven thousand, seven hundred twenty-three".