3979889723 has 2 divisors, whose sum is σ = 3979889724. Its totient is φ = 3979889722.

The previous prime is 3979889707. The next prime is 3979889747. The reversal of 3979889723 is 3279889793.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3979889723 - 2⁴ = 3979889707 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3979889723.

It is not a weakly prime, because it can be changed into another prime (3979882723) 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 as a sum of consecutive naturals, namely, 1989944861 + 1989944862.

It is an arithmetic number, because the mean of its divisors is an integer number (1989944862).

Almost surely, 2^3979889723 is an apocalyptic number.

3979889723 is a deficient number, since it is larger than the sum of its proper divisors (1).

3979889723 is an equidigital number, since it uses as much as digits as its factorization.

3979889723 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 41150592, while the sum is 65.

The square root of 3979889723 is about 63086.3671723139. The cubic root of 3979889723 is about 1584.7363250279.

The spelling of 3979889723 in words is "three billion, nine hundred seventy-nine million, eight hundred eighty-nine thousand, seven hundred twenty-three".