921372923 has 4 divisors (see below), whose sum is σ = 921497688. Its totient is φ = 921248160.

The previous prime is 921372899. The next prime is 921372989. The reversal of 921372923 is 329273129.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 921372923 - 2²⁴ = 904595707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (921372523) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50558 + ... + 66323.

It is an arithmetic number, because the mean of its divisors is an integer number (230374422).

Almost surely, 2^921372923 is an apocalyptic number.

921372923 is a deficient number, since it is larger than the sum of its proper divisors (124765).

921372923 is a wasteful number, since it uses less digits than its factorization.

921372923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124764.

The product of its digits is 40824, while the sum is 38.

The square root of 921372923 is about 30354.1253044788. The cubic root of 921372923 is about 973.0723863269.

The spelling of 921372923 in words is "nine hundred twenty-one million, three hundred seventy-two thousand, nine hundred twenty-three".