72432429 has 4 divisors (see below), whose sum is σ = 96576576. Its totient is φ = 48288284.

The previous prime is 72432403. The next prime is 72432439. The reversal of 72432429 is 92423427.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 92423427 = 3 ⋅30807809.

It is a cyclic number.

It is not a de Polignac number, because 72432429 - 2⁷ = 72432301 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 72432429.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72432439) 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 3 ways as a sum of consecutive naturals, for example, 12072069 + ... + 12072074.

It is an arithmetic number, because the mean of its divisors is an integer number (24144144).

Almost surely, 2^72432429 is an apocalyptic number.

It is an amenable number.

72432429 is a deficient number, since it is larger than the sum of its proper divisors (24144147).

72432429 is a wasteful number, since it uses less digits than its factorization.

72432429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24144146.

The product of its digits is 24192, while the sum is 33.

The square root of 72432429 is about 8510.7243522511. The cubic root of 72432429 is about 416.8479625627.

It can be divided in two parts, 724 and 32429, that added together give a triangular number (33153 = T₂₅₇).

The spelling of 72432429 in words is "seventy-two million, four hundred thirty-two thousand, four hundred twenty-nine".