3809909 has 2 divisors, whose sum is σ = 3809910. Its totient is φ = 3809908.

The previous prime is 3809903. The next prime is 3809917. The reversal of 3809909 is 9099083.

3809909 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., 2093809 + 1716100 = 1447^2 + 1310^2 .

It is a cyclic number.

It is not a de Polignac number, because 3809909 - 2⁸ = 3809653 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3809903) 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, 1904954 + 1904955.

It is an arithmetic number, because the mean of its divisors is an integer number (1904955).

Almost surely, 2^3809909 is an apocalyptic number.

It is an amenable number.

3809909 is a deficient number, since it is larger than the sum of its proper divisors (1).

3809909 is an equidigital number, since it uses as much as digits as its factorization.

3809909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17496, while the sum is 38.

The square root of 3809909 is about 1951.8988190990. The cubic root of 3809909 is about 156.1845968407.

The spelling of 3809909 in words is "three million, eight hundred nine thousand, nine hundred nine".