5565809 has 2 divisors, whose sum is σ = 5565810. Its totient is φ = 5565808.

The previous prime is 5565773. The next prime is 5565821. The reversal of 5565809 is 9085655.

5565809 is digitally balanced in base 3, 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., 3888784 + 1677025 = 1972^2 + 1295^2 .

It is a cyclic number.

It is not a de Polignac number, because 5565809 - 2¹² = 5561713 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (5565829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2782904 + 2782905.

It is an arithmetic number, because the mean of its divisors is an integer number (2782905).

Almost surely, 2^5565809 is an apocalyptic number.

It is an amenable number.

5565809 is a deficient number, since it is larger than the sum of its proper divisors (1).

5565809 is an equidigital number, since it uses as much as digits as its factorization.

5565809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54000, while the sum is 38.

The square root of 5565809 is about 2359.1966853147. The cubic root of 5565809 is about 177.2186536727.

The spelling of 5565809 in words is "five million, five hundred sixty-five thousand, eight hundred nine".