3931944979 has 4 divisors (see below), whose sum is σ = 3932194680. Its totient is φ = 3931695280.

The previous prime is 3931944953. The next prime is 3931945009. The reversal of 3931944979 is 9794491393.

3931944979 is digitally balanced in base 2, 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.

It is a cyclic number.

It is not a de Polignac number, because 3931944979 - 2¹³ = 3931936787 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3931944479) 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, 99517 + ... + 133294.

It is an arithmetic number, because the mean of its divisors is an integer number (983048670).

Almost surely, 2^3931944979 is an apocalyptic number.

3931944979 is a deficient number, since it is larger than the sum of its proper divisors (249701).

3931944979 is a wasteful number, since it uses less digits than its factorization.

3931944979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249700.

The product of its digits is 6613488, while the sum is 58.

The square root of 3931944979 is about 62705.2229004889. Note that the first 3 decimals coincide. The cubic root of 3931944979 is about 1578.3469571151.

The spelling of 3931944979 in words is "three billion, nine hundred thirty-one million, nine hundred forty-four thousand, nine hundred seventy-nine".