72443329 has 4 divisors (see below), whose sum is σ = 82792384. Its totient is φ = 62094276.

The previous prime is 72443321. The next prime is 72443339. The reversal of 72443329 is 92334427.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 72443329 - 2³ = 72443321 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72443294 and 72443303.

It is not an unprimeable number, because it can be changed into a prime (72443321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5174517 + ... + 5174530.

It is an arithmetic number, because the mean of its divisors is an integer number (20698096).

Almost surely, 2^72443329 is an apocalyptic number.

It is an amenable number.

72443329 is a deficient number, since it is larger than the sum of its proper divisors (10349055).

72443329 is a wasteful number, since it uses less digits than its factorization.

72443329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10349054.

The product of its digits is 36288, while the sum is 34.

The square root of 72443329 is about 8511.3646966864. The cubic root of 72443329 is about 416.8688713138.

The spelling of 72443329 in words is "seventy-two million, four hundred forty-three thousand, three hundred twenty-nine".