72233609 has 4 divisors (see below), whose sum is σ = 82552704. Its totient is φ = 61914516.

The previous prime is 72233599. The next prime is 72233621. The reversal of 72233609 is 90633227.

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 72233609 - 2⁸ = 72233353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72233309) 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, 5159537 + ... + 5159550.

It is an arithmetic number, because the mean of its divisors is an integer number (20638176).

Almost surely, 2^72233609 is an apocalyptic number.

It is an amenable number.

72233609 is a deficient number, since it is larger than the sum of its proper divisors (10319095).

72233609 is a wasteful number, since it uses less digits than its factorization.

72233609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10319094.

The product of its (nonzero) digits is 13608, while the sum is 32.

The square root of 72233609 is about 8499.0357688387. The cubic root of 72233609 is about 416.4662106350.

The spelling of 72233609 in words is "seventy-two million, two hundred thirty-three thousand, six hundred nine".