72337921 has 8 divisors (see below), whose sum is σ = 79456320. Its totient is φ = 65550672.

The previous prime is 72337901. The next prime is 72337943. The reversal of 72337921 is 12973327.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 72337921 - 2¹⁵ = 72305153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72337901) 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 7 ways as a sum of consecutive naturals, for example, 82330 + ... + 83203.

It is an arithmetic number, because the mean of its divisors is an integer number (9932040).

Almost surely, 2^72337921 is an apocalyptic number.

It is an amenable number.

72337921 is a deficient number, since it is larger than the sum of its proper divisors (7118399).

72337921 is a wasteful number, since it uses less digits than its factorization.

72337921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165575.

The product of its digits is 15876, while the sum is 34.

The square root of 72337921 is about 8505.1702510885. The cubic root of 72337921 is about 416.6665860978. Note that the first 3 decimals are identical.

The spelling of 72337921 in words is "seventy-two million, three hundred thirty-seven thousand, nine hundred twenty-one".