3878813369 has 2 divisors, whose sum is σ = 3878813370. Its totient is φ = 3878813368.

The previous prime is 3878813339. The next prime is 3878813371. The reversal of 3878813369 is 9633188783.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3518269225 + 360544144 = 59315^2 + 18988^2 .

It is a cyclic number.

It is not a de Polignac number, because 3878813369 - 2²⁴ = 3862036153 is a prime.

It is a super-2 number, since 2×3878813369² = 30090386303066260322, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 3878813371, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (3878813329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1939406684 + 1939406685.

It is an arithmetic number, because the mean of its divisors is an integer number (1939406685).

Almost surely, 2^3878813369 is an apocalyptic number.

It is an amenable number.

3878813369 is a deficient number, since it is larger than the sum of its proper divisors (1).

3878813369 is an equidigital number, since it uses as much as digits as its factorization.

3878813369 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5225472, while the sum is 56.

The square root of 3878813369 is about 62280.1201749001. The cubic root of 3878813369 is about 1571.2053935579.

The spelling of 3878813369 in words is "three billion, eight hundred seventy-eight million, eight hundred thirteen thousand, three hundred sixty-nine".