3878279 has 2 divisors, whose sum is σ = 3878280. Its totient is φ = 3878278.

The previous prime is 3878269. The next prime is 3878291. The reversal of 3878279 is 9728783.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3878279 - 2⁴ = 3878263 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 (3878209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1939139 + 1939140.

It is an arithmetic number, because the mean of its divisors is an integer number (1939140).

Almost surely, 2^3878279 is an apocalyptic number.

3878279 is a deficient number, since it is larger than the sum of its proper divisors (1).

3878279 is an equidigital number, since it uses as much as digits as its factorization.

3878279 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 169344, while the sum is 44.

The square root of 3878279 is about 1969.3346592187. The cubic root of 3878279 is about 157.1133237297.

The spelling of 3878279 in words is "three million, eight hundred seventy-eight thousand, two hundred seventy-nine".