3979843369 has 2 divisors, whose sum is σ = 3979843370. Its totient is φ = 3979843368.

The previous prime is 3979843367. The next prime is 3979843403. The reversal of 3979843369 is 9633489793.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3967488144 + 12355225 = 62988^2 + 3515^2 .

It is a cyclic number.

It is not a de Polignac number, because 3979843369 - 2¹ = 3979843367 is a prime.

It is a super-2 number, since 2×3979843369² = 31678306483546540322, which contains 22 as substring.

Together with 3979843367, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (3979843363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1989921684 + 1989921685.

It is an arithmetic number, because the mean of its divisors is an integer number (1989921685).

Almost surely, 2^3979843369 is an apocalyptic number.

It is an amenable number.

3979843369 is a deficient number, since it is larger than the sum of its proper divisors (1).

3979843369 is an equidigital number, since it uses as much as digits as its factorization.

3979843369 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26453952, while the sum is 61.

The square root of 3979843369 is about 63085.9997860064. Note that the first 3 decimals coincide. The cubic root of 3979843369 is about 1584.7301724995.

The spelling of 3979843369 in words is "three billion, nine hundred seventy-nine million, eight hundred forty-three thousand, three hundred sixty-nine".