3689689 has 2 divisors, whose sum is σ = 3689690. Its totient is φ = 3689688.

The previous prime is 3689669. The next prime is 3689711. The reversal of 3689689 is 9869863.

3689689 is digitally balanced in base 2, 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., 2152089 + 1537600 = 1467^2 + 1240^2 .

It is an emirp because it is prime and its reverse (9869863) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3689689 is a prime.

It is a super-2 number, since 2×3689689² = 27227609833442, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (3689669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1844844 + 1844845.

It is an arithmetic number, because the mean of its divisors is an integer number (1844845).

Almost surely, 2^3689689 is an apocalyptic number.

It is an amenable number.

3689689 is a deficient number, since it is larger than the sum of its proper divisors (1).

3689689 is an equidigital number, since it uses as much as digits as its factorization.

3689689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 559872, while the sum is 49.

The square root of 3689689 is about 1920.8563194575. The cubic root of 3689689 is about 154.5242296426.

The spelling of 3689689 in words is "three million, six hundred eighty-nine thousand, six hundred eighty-nine".