11090809 has 2 divisors, whose sum is σ = 11090810. Its totient is φ = 11090808.

The previous prime is 11090791. The next prime is 11090819. The reversal of 11090809 is 90809011.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7840000 + 3250809 = 2800^2 + 1803^2 .

It is an emirp because it is prime and its reverse (90809011) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11090809 - 2⁹ = 11090297 is a prime.

It is not a weakly prime, because it can be changed into another prime (11090819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5545404 + 5545405.

It is an arithmetic number, because the mean of its divisors is an integer number (5545405).

Almost surely, 2^11090809 is an apocalyptic number.

It is an amenable number.

11090809 is a deficient number, since it is larger than the sum of its proper divisors (1).

11090809 is an equidigital number, since it uses as much as digits as its factorization.

11090809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 28.

The square root of 11090809 is about 3330.2866243013. The cubic root of 11090809 is about 223.0083248114.

The spelling of 11090809 in words is "eleven million, ninety thousand, eight hundred nine".