5609809 has 2 divisors, whose sum is σ = 5609810. Its totient is φ = 5609808.

The previous prime is 5609803. The next prime is 5609827. The reversal of 5609809 is 9089065.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3814209 + 1795600 = 1953^2 + 1340^2 .

It is a cyclic number.

It is not a de Polignac number, because 5609809 - 2⁵ = 5609777 is a prime.

It is not a weakly prime, because it can be changed into another prime (5609803) 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, 2804904 + 2804905.

It is an arithmetic number, because the mean of its divisors is an integer number (2804905).

Almost surely, 2^5609809 is an apocalyptic number.

It is an amenable number.

5609809 is a deficient number, since it is larger than the sum of its proper divisors (1).

5609809 is an equidigital number, since it uses as much as digits as its factorization.

5609809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19440, while the sum is 37.

The square root of 5609809 is about 2368.5035359906. The cubic root of 5609809 is about 177.6844238023.

The spelling of 5609809 in words is "five million, six hundred nine thousand, eight hundred nine".