3894368813 has 2 divisors, whose sum is σ = 3894368814. Its totient is φ = 3894368812.

The previous prime is 3894368759. The next prime is 3894368851. The reversal of 3894368813 is 3188634983.

3894368813 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2889922564 + 1004446249 = 53758^2 + 31693^2 .

It is a cyclic number.

It is not a de Polignac number, because 3894368813 - 2⁸ = 3894368557 is a prime.

It is a super-2 number, since 2×3894368813² = 30332216903334057938, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3894368113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1947184406 + 1947184407.

It is an arithmetic number, because the mean of its divisors is an integer number (1947184407).

Almost surely, 2^3894368813 is an apocalyptic number.

It is an amenable number.

3894368813 is a deficient number, since it is larger than the sum of its proper divisors (1).

3894368813 is an equidigital number, since it uses as much as digits as its factorization.

3894368813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2985984, while the sum is 53.

The square root of 3894368813 is about 62404.8781186215. The cubic root of 3894368813 is about 1573.3029592861.

The spelling of 3894368813 in words is "three billion, eight hundred ninety-four million, three hundred sixty-eight thousand, eight hundred thirteen".