1116809 has 2 divisors, whose sum is σ = 1116810. Its totient is φ = 1116808.

The previous prime is 1116751. The next prime is 1116821. The reversal of 1116809 is 9086111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1056784 + 60025 = 1028^2 + 245^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1116809 is a prime.

It is not a weakly prime, because it can be changed into another prime (1116859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 558404 + 558405.

It is an arithmetic number, because the mean of its divisors is an integer number (558405).

2^1116809 is an apocalyptic number.

It is an amenable number.

1116809 is a deficient number, since it is larger than the sum of its proper divisors (1).

1116809 is an equidigital number, since it uses as much as digits as its factorization.

1116809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 26.

The square root of 1116809 is about 1056.7918432691. The cubic root of 1116809 is about 103.7511617424.

The spelling of 1116809 in words is "one million, one hundred sixteen thousand, eight hundred nine".