3866249689 has 2 divisors, whose sum is σ = 3866249690. Its totient is φ = 3866249688.

The previous prime is 3866249683. The next prime is 3866249707. The reversal of 3866249689 is 9869426683.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3619225600 + 247024089 = 60160^2 + 15717^2 .

It is an emirp because it is prime and its reverse (9869426683) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3866249689 - 2¹³ = 3866241497 is a prime.

It is not a weakly prime, because it can be changed into another prime (3866249683) 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, 1933124844 + 1933124845.

It is an arithmetic number, because the mean of its divisors is an integer number (1933124845).

Almost surely, 2^3866249689 is an apocalyptic number.

It is an amenable number.

3866249689 is a deficient number, since it is larger than the sum of its proper divisors (1).

3866249689 is an equidigital number, since it uses as much as digits as its factorization.

3866249689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26873856, while the sum is 61.

The square root of 3866249689 is about 62179.1740778213. The cubic root of 3866249689 is about 1569.5071531056.

The spelling of 3866249689 in words is "three billion, eight hundred sixty-six million, two hundred forty-nine thousand, six hundred eighty-nine".