11285809 has 2 divisors, whose sum is σ = 11285810. Its totient is φ = 11285808.

The previous prime is 11285779. The next prime is 11285831. The reversal of 11285809 is 90858211.

11285809 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., 9168784 + 2117025 = 3028^2 + 1455^2 .

It is a cyclic number.

It is not a de Polignac number, because 11285809 - 2¹¹ = 11283761 is a prime.

It is not a weakly prime, because it can be changed into another prime (11285839) 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, 5642904 + 5642905.

It is an arithmetic number, because the mean of its divisors is an integer number (5642905).

Almost surely, 2^11285809 is an apocalyptic number.

It is an amenable number.

11285809 is a deficient number, since it is larger than the sum of its proper divisors (1).

11285809 is an equidigital number, since it uses as much as digits as its factorization.

11285809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5760, while the sum is 34.

The square root of 11285809 is about 3359.4358157286. The cubic root of 11285809 is about 224.3077257105.

The spelling of 11285809 in words is "eleven million, two hundred eighty-five thousand, eight hundred nine".