3931323421 has 4 divisors (see below), whose sum is σ = 4138235200. Its totient is φ = 3724411644.

The previous prime is 3931323401. The next prime is 3931323427. The reversal of 3931323421 is 1243231393.

3931323421 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3931323421 - 2¹⁵ = 3931290653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3931323427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103455861 + ... + 103455898.

It is an arithmetic number, because the mean of its divisors is an integer number (1034558800).

Almost surely, 2^3931323421 is an apocalyptic number.

It is an amenable number.

3931323421 is a deficient number, since it is larger than the sum of its proper divisors (206911779).

3931323421 is a wasteful number, since it uses less digits than its factorization.

3931323421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206911778.

The product of its digits is 11664, while the sum is 31.

The square root of 3931323421 is about 62700.2665145851. The cubic root of 3931323421 is about 1578.2637848868.

The spelling of 3931323421 in words is "three billion, nine hundred thirty-one million, three hundred twenty-three thousand, four hundred twenty-one".