3881918837 has 2 divisors, whose sum is σ = 3881918838. Its totient is φ = 3881918836.

The previous prime is 3881918809. The next prime is 3881918849. The reversal of 3881918837 is 7388191883.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3045494596 + 836424241 = 55186^2 + 28921^2 .

It is a cyclic number.

It is not a de Polignac number, because 3881918837 - 2⁶ = 3881918773 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3881918867) 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, 1940959418 + 1940959419.

It is an arithmetic number, because the mean of its divisors is an integer number (1940959419).

Almost surely, 2^3881918837 is an apocalyptic number.

It is an amenable number.

3881918837 is a deficient number, since it is larger than the sum of its proper divisors (1).

3881918837 is an equidigital number, since it uses as much as digits as its factorization.

3881918837 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2322432, while the sum is 56.

The square root of 3881918837 is about 62305.0466415041. The cubic root of 3881918837 is about 1571.6245962039.

The spelling of 3881918837 in words is "three billion, eight hundred eighty-one million, nine hundred eighteen thousand, eight hundred thirty-seven".