3871068781 has 2 divisors, whose sum is σ = 3871068782. Its totient is φ = 3871068780.

The previous prime is 3871068769. The next prime is 3871068811. The reversal of 3871068781 is 1878601783.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1947456900 + 1923611881 = 44130^2 + 43859^2 .

It is a cyclic number.

It is not a de Polignac number, because 3871068781 - 2⁹ = 3871068269 is a prime.

It is a super-2 number, since 2×3871068781² = 29970347014465651922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3871068281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1935534390 + 1935534391.

It is an arithmetic number, because the mean of its divisors is an integer number (1935534391).

Almost surely, 2^3871068781 is an apocalyptic number.

It is an amenable number.

3871068781 is a deficient number, since it is larger than the sum of its proper divisors (1).

3871068781 is an equidigital number, since it uses as much as digits as its factorization.

3871068781 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 451584, while the sum is 49.

The square root of 3871068781 is about 62217.9136664032. The cubic root of 3871068781 is about 1570.1589871045.

The spelling of 3871068781 in words is "three billion, eight hundred seventy-one million, sixty-eight thousand, seven hundred eighty-one".