7921923 has 8 divisors (see below), whose sum is σ = 10601808. Its totient is φ = 5261664.

The previous prime is 7921919. The next prime is 7921931. The reversal of 7921923 is 3291297.

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

It is not a de Polignac number, because 7921923 - 2² = 7921919 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7921943) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3936 + ... + 5597.

It is an arithmetic number, because the mean of its divisors is an integer number (1325226).

Almost surely, 2^7921923 is an apocalyptic number.

7921923 is a deficient number, since it is larger than the sum of its proper divisors (2679885).

7921923 is a wasteful number, since it uses less digits than its factorization.

7921923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9813.

The product of its digits is 6804, while the sum is 33.

The square root of 7921923 is about 2814.5910893059. The cubic root of 7921923 is about 199.3472301086.

The spelling of 7921923 in words is "seven million, nine hundred twenty-one thousand, nine hundred twenty-three".