3878371291 has 2 divisors, whose sum is σ = 3878371292. Its totient is φ = 3878371290.

The previous prime is 3878371267. The next prime is 3878371337. The reversal of 3878371291 is 1921738783.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (1921738783) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3878371291 - 2⁷ = 3878371163 is a prime.

It is not a weakly prime, because it can be changed into another prime (3878371201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1939185645 + 1939185646.

It is an arithmetic number, because the mean of its divisors is an integer number (1939185646).

Almost surely, 2^3878371291 is an apocalyptic number.

3878371291 is a deficient number, since it is larger than the sum of its proper divisors (1).

3878371291 is an equidigital number, since it uses as much as digits as its factorization.

3878371291 is an evil number, because the sum of its binary digits is even.

The product of its digits is 508032, while the sum is 49.

The square root of 3878371291 is about 62276.5709637260. The cubic root of 3878371291 is about 1571.1456998955.

The spelling of 3878371291 in words is "three billion, eight hundred seventy-eight million, three hundred seventy-one thousand, two hundred ninety-one".