72143823 has 12 divisors (see below), whose sum is σ = 96825368. Its totient is φ = 47780880.

The previous prime is 72143807. The next prime is 72143837. The reversal of 72143823 is 32834127.

It is not a de Polignac number, because 72143823 - 2⁴ = 72143807 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 (72143803) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 171153 + ... + 171573.

Almost surely, 2^72143823 is an apocalyptic number.

72143823 is a deficient number, since it is larger than the sum of its proper divisors (24681545).

72143823 is an equidigital number, since it uses as much as digits as its factorization.

72143823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 902 (or 663 counting only the distinct ones).

The product of its digits is 8064, while the sum is 30.

The square root of 72143823 is about 8493.7519977923. The cubic root of 72143823 is about 416.2935839798.

It can be divided in two parts, 721 and 43823, that added together give a palindrome (44544).

The spelling of 72143823 in words is "seventy-two million, one hundred forty-three thousand, eight hundred twenty-three".