3719789861 has 2 divisors, whose sum is σ = 3719789862. Its totient is φ = 3719789860.

The previous prime is 3719789849. The next prime is 3719789881. The reversal of 3719789861 is 1689879173.

3719789861 is digitally balanced in base 3, 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., 3697369636 + 22420225 = 60806^2 + 4735^2 .

It is an emirp because it is prime and its reverse (1689879173) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3719789861 - 2¹⁸ = 3719527717 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3719789861.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3719789831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1859894930 + 1859894931.

It is an arithmetic number, because the mean of its divisors is an integer number (1859894931).

Almost surely, 2^3719789861 is an apocalyptic number.

It is an amenable number.

3719789861 is a deficient number, since it is larger than the sum of its proper divisors (1).

3719789861 is an equidigital number, since it uses as much as digits as its factorization.

3719789861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4572288, while the sum is 59.

The square root of 3719789861 is about 60990.0800212625. The cubic root of 3719789861 is about 1549.4330026045.

The spelling of 3719789861 in words is "three billion, seven hundred nineteen million, seven hundred eighty-nine thousand, eight hundred sixty-one".