11012809 has 2 divisors, whose sum is σ = 11012810. Its totient is φ = 11012808.

The previous prime is 11012767. The next prime is 11012851. The reversal of 11012809 is 90821011.

It is a balanced prime because it is at equal distance from previous prime (11012767) and next prime (11012851).

It can be written as a sum of positive squares in only one way, i.e., 5593225 + 5419584 = 2365^2 + 2328^2 .

It is a cyclic number.

It is not a de Polignac number, because 11012809 - 2⁷ = 11012681 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11012809.

It is not a weakly prime, because it can be changed into another prime (11012509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5506404 + 5506405.

It is an arithmetic number, because the mean of its divisors is an integer number (5506405).

Almost surely, 2^11012809 is an apocalyptic number.

It is an amenable number.

11012809 is a deficient number, since it is larger than the sum of its proper divisors (1).

11012809 is an equidigital number, since it uses as much as digits as its factorization.

11012809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 22.

The square root of 11012809 is about 3318.5552579398. Note that the first 3 decimals coincide. The cubic root of 11012809 is about 222.4842996959.

The spelling of 11012809 in words is "eleven million, twelve thousand, eight hundred nine".