1086809 has 2 divisors, whose sum is σ = 1086810. Its totient is φ = 1086808.

The previous prime is 1086791. The next prime is 1086817. The reversal of 1086809 is 9086801.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 861184 + 225625 = 928^2 + 475^2 .

It is an emirp because it is prime and its reverse (9086801) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1086809 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1086859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 543404 + 543405.

It is an arithmetic number, because the mean of its divisors is an integer number (543405).

2^1086809 is an apocalyptic number.

It is an amenable number.

1086809 is a deficient number, since it is larger than the sum of its proper divisors (1).

1086809 is an equidigital number, since it uses as much as digits as its factorization.

1086809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 32.

The square root of 1086809 is about 1042.5013189440. The cubic root of 1086809 is about 102.8137205566.

The spelling of 1086809 in words is "one million, eighty-six thousand, eight hundred nine".