3684809 has 2 divisors, whose sum is σ = 3684810. Its totient is φ = 3684808.

The previous prime is 3684781. The next prime is 3684833. The reversal of 3684809 is 9084863.

3684809 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3385600 + 299209 = 1840^2 + 547^2 .

It is an emirp because it is prime and its reverse (9084863) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3684809 - 2⁸ = 3684553 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (3684859) 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, 1842404 + 1842405.

It is an arithmetic number, because the mean of its divisors is an integer number (1842405).

Almost surely, 2^3684809 is an apocalyptic number.

It is an amenable number.

3684809 is a deficient number, since it is larger than the sum of its proper divisors (1).

3684809 is an equidigital number, since it uses as much as digits as its factorization.

3684809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 41472, while the sum is 38.

The square root of 3684809 is about 1919.5856323697. The cubic root of 3684809 is about 154.4560747625.

The spelling of 3684809 in words is "three million, six hundred eighty-four thousand, eight hundred nine".