11123009 has 2 divisors, whose sum is σ = 11123010. Its totient is φ = 11123008.

The previous prime is 11122997. The next prime is 11123011. The reversal of 11123009 is 90032111.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11122225 + 784 = 3335^2 + 28^2 .

It is a cyclic number.

It is not a de Polignac number, because 11123009 - 2⁸ = 11122753 is a prime.

It is a Sophie Germain prime.

Together with 11123011, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (11123039) 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, 5561504 + 5561505.

It is an arithmetic number, because the mean of its divisors is an integer number (5561505).

Almost surely, 2^11123009 is an apocalyptic number.

It is an amenable number.

11123009 is a deficient number, since it is larger than the sum of its proper divisors (1).

11123009 is an equidigital number, since it uses as much as digits as its factorization.

11123009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54, while the sum is 17.

The square root of 11123009 is about 3335.1175391581. The cubic root of 11123009 is about 223.2239366701.

The spelling of 11123009 in words is "eleven million, one hundred twenty-three thousand, nine".