3979999799 has 2 divisors, whose sum is σ = 3979999800. Its totient is φ = 3979999798.

The previous prime is 3979999789. The next prime is 3979999813. The reversal of 3979999799 is 9979999793.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3979999799 - 2¹² = 3979995703 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3979999789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1989999899 + 1989999900.

It is an arithmetic number, because the mean of its divisors is an integer number (1989999900).

Almost surely, 2^3979999799 is an apocalyptic number.

3979999799 is a deficient number, since it is larger than the sum of its proper divisors (1).

3979999799 is an equidigital number, since it uses as much as digits as its factorization.

3979999799 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 703096443, while the sum is 80.

The square root of 3979999799 is about 63087.2395893179. The cubic root of 3979999799 is about 1584.7509351335.

The spelling of 3979999799 in words is "three billion, nine hundred seventy-nine million, nine hundred ninety-nine thousand, seven hundred ninety-nine".