72744723 has 14 divisors (see below), whose sum is σ = 109068284. Its totient is φ = 48495996.

The previous prime is 72744713. The next prime is 72744739. The reversal of 72744723 is 32744727.

It is not a de Polignac number, because 72744723 - 2⁸ = 72744467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72744713) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 49165 + ... + 50622.

Almost surely, 2^72744723 is an apocalyptic number.

72744723 is a deficient number, since it is larger than the sum of its proper divisors (36323561).

72744723 is an frugal number, since it uses more digits than its factorization.

72744723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99805 (or 99790 counting only the distinct ones).

The product of its digits is 65856, while the sum is 36.

The square root of 72744723 is about 8529.0517057877. The cubic root of 72744723 is about 417.4461866649.

The spelling of 72744723 in words is "seventy-two million, seven hundred forty-four thousand, seven hundred twenty-three".