1099309 has 2 divisors, whose sum is σ = 1099310. Its totient is φ = 1099308.

The previous prime is 1099289. The next prime is 1099313. The reversal of 1099309 is 9039901.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 896809 + 202500 = 947^2 + 450^2 .

It is a cyclic number.

It is not a de Polignac number, because 1099309 - 2⁷ = 1099181 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1099369) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 549654 + 549655.

It is an arithmetic number, because the mean of its divisors is an integer number (549655).

2^1099309 is an apocalyptic number.

It is an amenable number.

1099309 is a deficient number, since it is larger than the sum of its proper divisors (1).

1099309 is an equidigital number, since it uses as much as digits as its factorization.

1099309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2187, while the sum is 31.

The square root of 1099309 is about 1048.4793750952. The cubic root of 1099309 is about 103.2063916979.

The spelling of 1099309 in words is "one million, ninety-nine thousand, three hundred nine".