11009090909 has 2 divisors, whose sum is σ = 11009090910. Its totient is φ = 11009090908.

The previous prime is 11009090893. The next prime is 11009090929. The reversal of 11009090909 is 90909090011.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9750970009 + 1258120900 = 98747^2 + 35470^2 .

It is a cyclic number.

It is not a de Polignac number, because 11009090909 - 2⁴ = 11009090893 is a prime.

11009090909 is a modest number, since divided by 90909 gives 11009 as remainder.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11009090929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5504545454 + 5504545455.

It is an arithmetic number, because the mean of its divisors is an integer number (5504545455).

Almost surely, 2^11009090909 is an apocalyptic number.

It is an amenable number.

11009090909 is a deficient number, since it is larger than the sum of its proper divisors (1).

11009090909 is an equidigital number, since it uses as much as digits as its factorization.

11009090909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6561, while the sum is 38.

The spelling of 11009090909 in words is "eleven billion, nine million, ninety thousand, nine hundred nine".