3979889779 has 2 divisors, whose sum is σ = 3979889780. Its totient is φ = 3979889778.

The previous prime is 3979889761. The next prime is 3979889827. The reversal of 3979889779 is 9779889793.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3979889779 - 2⁵ = 3979889747 is a prime.

It is not a weakly prime, because it can be changed into another prime (3979881779) 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, 1989944889 + 1989944890.

It is an arithmetic number, because the mean of its divisors is an integer number (1989944890).

Almost surely, 2^3979889779 is an apocalyptic number.

3979889779 is a deficient number, since it is larger than the sum of its proper divisors (1).

3979889779 is an equidigital number, since it uses as much as digits as its factorization.

3979889779 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 432081216, while the sum is 76.

The square root of 3979889779 is about 63086.3676161498. The cubic root of 3979889779 is about 1584.7363324607.

The spelling of 3979889779 in words is "three billion, nine hundred seventy-nine million, eight hundred eighty-nine thousand, seven hundred seventy-nine".