1100000009 has 2 divisors, whose sum is σ = 1100000010. Its totient is φ = 1100000008.

The previous prime is 1099999997. The next prime is 1100000017. The reversal of 1100000009 is 9000000011.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 938074384 + 161925625 = 30628^2 + 12725^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1100000009 is a prime.

It is not a weakly prime, because it can be changed into another prime (1100000059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 550000004 + 550000005.

It is an arithmetic number, because the mean of its divisors is an integer number (550000005).

Almost surely, 2^1100000009 is an apocalyptic number.

It is an amenable number.

1100000009 is a deficient number, since it is larger than the sum of its proper divisors (1).

1100000009 is an equidigital number, since it uses as much as digits as its factorization.

1100000009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9, while the sum is 11.

The square root of 1100000009 is about 33166.2480392341. The cubic root of 1100000009 is about 1032.2801182717.

The spelling of 1100000009 in words is "one billion, one hundred million, nine", and thus it is an aban number.