11223809 has 2 divisors, whose sum is σ = 11223810. Its totient is φ = 11223808.

The previous prime is 11223803. The next prime is 11223811. The reversal of 11223809 is 90832211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11075584 + 148225 = 3328^2 + 385^2 .

It is a cyclic number.

It is not a de Polignac number, because 11223809 - 2¹² = 11219713 is a prime.

Together with 11223811, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (11223803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5611904 + 5611905.

It is an arithmetic number, because the mean of its divisors is an integer number (5611905).

Almost surely, 2^11223809 is an apocalyptic number.

It is an amenable number.

11223809 is a deficient number, since it is larger than the sum of its proper divisors (1).

11223809 is an equidigital number, since it uses as much as digits as its factorization.

11223809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 11223809 is about 3350.1953674375. The cubic root of 11223809 is about 223.8962170697.

The spelling of 11223809 in words is "eleven million, two hundred twenty-three thousand, eight hundred nine".