11130809 has 4 divisors (see below), whose sum is σ = 11514660. Its totient is φ = 10746960.

The previous prime is 11130799. The next prime is 11130817. The reversal of 11130809 is 90803111.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6615184 + 4515625 = 2572^2 + 2125^2 .

It is a cyclic number.

It is not a de Polignac number, because 11130809 - 2⁴ = 11130793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11130859) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 191882 + ... + 191939.

It is an arithmetic number, because the mean of its divisors is an integer number (2878665).

Almost surely, 2^11130809 is an apocalyptic number.

It is an amenable number.

11130809 is a deficient number, since it is larger than the sum of its proper divisors (383851).

11130809 is an equidigital number, since it uses as much as digits as its factorization.

11130809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 383850.

The product of its (nonzero) digits is 216, while the sum is 23.

The square root of 11130809 is about 3336.2867083031. The cubic root of 11130809 is about 223.2761030060.

The spelling of 11130809 in words is "eleven million, one hundred thirty thousand, eight hundred nine".