3689869 has 2 divisors, whose sum is σ = 3689870. Its totient is φ = 3689868.

The previous prime is 3689863. The next prime is 3689887. The reversal of 3689869 is 9689863.

3689869 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., 3104644 + 585225 = 1762^2 + 765^2 .

It is a cyclic number.

It is not a de Polignac number, because 3689869 - 2¹⁹ = 3165581 is a prime.

It is a super-2 number, since 2×3689869² = 27230266474322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3689863) 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, 1844934 + 1844935.

It is an arithmetic number, because the mean of its divisors is an integer number (1844935).

Almost surely, 2^3689869 is an apocalyptic number.

It is an amenable number.

3689869 is a deficient number, since it is larger than the sum of its proper divisors (1).

3689869 is an equidigital number, since it uses as much as digits as its factorization.

3689869 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 3689869 is about 1920.9031729892. The cubic root of 3689869 is about 154.5267424026.

The spelling of 3689869 in words is "three million, six hundred eighty-nine thousand, eight hundred sixty-nine".