72143723 has 16 divisors (see below), whose sum is σ = 76403712. Its totient is φ = 68040000.

The previous prime is 72143719. The next prime is 72143737. The reversal of 72143723 is 32734127.

It is a cyclic number.

It is not a de Polignac number, because 72143723 - 2² = 72143719 is a prime.

It is a Smith number, since the sum of its digits (29) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72143713) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 266078 + ... + 266348.

It is an arithmetic number, because the mean of its divisors is an integer number (4775232).

Almost surely, 2^72143723 is an apocalyptic number.

72143723 is a deficient number, since it is larger than the sum of its proper divisors (4259989).

72143723 is a wasteful number, since it uses less digits than its factorization.

72143723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 506.

The product of its digits is 7056, while the sum is 29.

The square root of 72143723 is about 8493.7461111102. The cubic root of 72143723 is about 416.2933916354.

It can be divided in two parts, 721 and 43723, that added together give a palindrome (44444).

The spelling of 72143723 in words is "seventy-two million, one hundred forty-three thousand, seven hundred twenty-three".