3879678109 has 2 divisors, whose sum is σ = 3879678110. Its totient is φ = 3879678108.

The previous prime is 3879678097. The next prime is 3879678149. The reversal of 3879678109 is 9018769783.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3299928025 + 579750084 = 57445^2 + 24078^2 .

It is a cyclic number.

It is not a de Polignac number, because 3879678109 - 2⁷ = 3879677981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3879678149) 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, 1939839054 + 1939839055.

It is an arithmetic number, because the mean of its divisors is an integer number (1939839055).

Almost surely, 2^3879678109 is an apocalyptic number.

It is an amenable number.

3879678109 is a deficient number, since it is larger than the sum of its proper divisors (1).

3879678109 is an equidigital number, since it uses as much as digits as its factorization.

3879678109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4572288, while the sum is 58.

The square root of 3879678109 is about 62287.0621317140. The cubic root of 3879678109 is about 1571.3221460341.

The spelling of 3879678109 in words is "three billion, eight hundred seventy-nine million, six hundred seventy-eight thousand, one hundred nine".