3813778889 has 2 divisors, whose sum is σ = 3813778890. Its totient is φ = 3813778888.

The previous prime is 3813778883. The next prime is 3813778897. The reversal of 3813778889 is 9888773183.

3813778889 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2082553225 + 1731225664 = 45635^2 + 41608^2 .

It is an emirp because it is prime and its reverse (9888773183) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3813778889 is a prime.

It is not a weakly prime, because it can be changed into another prime (3813778883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1906889444 + 1906889445.

It is an arithmetic number, because the mean of its divisors is an integer number (1906889445).

Almost surely, 2^3813778889 is an apocalyptic number.

It is an amenable number.

3813778889 is a deficient number, since it is larger than the sum of its proper divisors (1).

3813778889 is an equidigital number, since it uses as much as digits as its factorization.

3813778889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16257024, while the sum is 62.

The square root of 3813778889 is about 61755.8004482170. The cubic root of 3813778889 is about 1562.3746009144.

The spelling of 3813778889 in words is "three billion, eight hundred thirteen million, seven hundred seventy-eight thousand, eight hundred eighty-nine".