72632921 has 8 divisors (see below), whose sum is σ = 73923360. Its totient is φ = 71353728.

The previous prime is 72632899. The next prime is 72632933. The reversal of 72632921 is 12923627.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72632921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72632941) 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, 10790 + ... + 16176.

It is an arithmetic number, because the mean of its divisors is an integer number (9240420).

Almost surely, 2^72632921 is an apocalyptic number.

It is an amenable number.

72632921 is a deficient number, since it is larger than the sum of its proper divisors (1290439).

72632921 is a wasteful number, since it uses less digits than its factorization.

72632921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5623.

The product of its digits is 9072, while the sum is 32.

The square root of 72632921 is about 8522.4949985318. The cubic root of 72632921 is about 417.2322181142.

The spelling of 72632921 in words is "seventy-two million, six hundred thirty-two thousand, nine hundred twenty-one".