72534423 has 32 divisors (see below), whose sum is σ = 109670400. Its totient is φ = 42327936.

The previous prime is 72534409. The next prime is 72534431. The reversal of 72534423 is 32443527.

It is not a de Polignac number, because 72534423 - 2⁵ = 72534391 is a prime.

It is a super-2 number, since 2×72534423² = 10522485039885858, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72534443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 66186 + ... + 67272.

It is an arithmetic number, because the mean of its divisors is an integer number (3427200).

Almost surely, 2^72534423 is an apocalyptic number.

72534423 is a deficient number, since it is larger than the sum of its proper divisors (37135977).

72534423 is a wasteful number, since it uses less digits than its factorization.

72534423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1191.

The product of its digits is 20160, while the sum is 30.

The square root of 72534423 is about 8516.7143312430. The cubic root of 72534423 is about 417.0435289745.

The spelling of 72534423 in words is "seventy-two million, five hundred thirty-four thousand, four hundred twenty-three".