3887777813 has 2 divisors, whose sum is σ = 3887777814. Its totient is φ = 3887777812.

The previous prime is 3887777807. The next prime is 3887777879. The reversal of 3887777813 is 3187777883.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2502300529 + 1385477284 = 50023^2 + 37222^2 .

It is a cyclic number.

It is not a de Polignac number, because 3887777813 - 2²⁰ = 3886729237 is a prime.

It is a super-2 number, since 2×3887777813² = 30229632646510125938, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3887777893) 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, 1943888906 + 1943888907.

It is an arithmetic number, because the mean of its divisors is an integer number (1943888907).

Almost surely, 2^3887777813 is an apocalyptic number.

It is an amenable number.

3887777813 is a deficient number, since it is larger than the sum of its proper divisors (1).

3887777813 is an equidigital number, since it uses as much as digits as its factorization.

3887777813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11063808, while the sum is 59.

The square root of 3887777813 is about 62352.0473841878. The cubic root of 3887777813 is about 1572.4148825253.

The spelling of 3887777813 in words is "three billion, eight hundred eighty-seven million, seven hundred seventy-seven thousand, eight hundred thirteen".