72537723 has 24 divisors (see below), whose sum is σ = 109403216. Its totient is φ = 46267200.

The previous prime is 72537697. The next prime is 72537743. The reversal of 72537723 is 32773527.

It is not a de Polignac number, because 72537723 - 2⁸ = 72537467 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72537743) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18528 + ... + 22098.

Almost surely, 2^72537723 is an apocalyptic number.

72537723 is a deficient number, since it is larger than the sum of its proper divisors (36865493).

72537723 is a wasteful number, since it uses less digits than its factorization.

72537723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3675 (or 3672 counting only the distinct ones).

The product of its digits is 61740, while the sum is 36.

The square root of 72537723 is about 8516.9080657243. The cubic root of 72537723 is about 417.0498534327.

The spelling of 72537723 in words is "seventy-two million, five hundred thirty-seven thousand, seven hundred twenty-three".