3878904439 has 2 divisors, whose sum is σ = 3878904440. Its totient is φ = 3878904438.

The previous prime is 3878904431. The next prime is 3878904457. The reversal of 3878904439 is 9344098783.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3878904439 - 2³ = 3878904431 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3878904439.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3878904431) 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, 1939452219 + 1939452220.

It is an arithmetic number, because the mean of its divisors is an integer number (1939452220).

Almost surely, 2^3878904439 is an apocalyptic number.

3878904439 is a deficient number, since it is larger than the sum of its proper divisors (1).

3878904439 is an equidigital number, since it uses as much as digits as its factorization.

3878904439 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5225472, while the sum is 55.

The square root of 3878904439 is about 62280.8513027881. The cubic root of 3878904439 is about 1571.2176901498.

The spelling of 3878904439 in words is "three billion, eight hundred seventy-eight million, nine hundred four thousand, four hundred thirty-nine".