7921423 has 6 divisors (see below), whose sum is σ = 8360664. Its totient is φ = 7504164.

The previous prime is 7921411. The next prime is 7921447. The reversal of 7921423 is 3241297.

It is not a de Polignac number, because 7921423 - 2⁵ = 7921391 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7921391 and 7921400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7921493) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10611 + ... + 11332.

It is an arithmetic number, because the mean of its divisors is an integer number (1393444).

Almost surely, 2^7921423 is an apocalyptic number.

7921423 is a deficient number, since it is larger than the sum of its proper divisors (439241).

7921423 is a wasteful number, since it uses less digits than its factorization.

7921423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21981 (or 21962 counting only the distinct ones).

The product of its digits is 3024, while the sum is 28.

The square root of 7921423 is about 2814.5022650550. The cubic root of 7921423 is about 199.3430360212.

The spelling of 7921423 in words is "seven million, nine hundred twenty-one thousand, four hundred twenty-three".