223368809 has 2 divisors, whose sum is σ = 223368810. Its totient is φ = 223368808.

The previous prime is 223368781. The next prime is 223368811. The reversal of 223368809 is 908863322.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 193905625 + 29463184 = 13925^2 + 5428^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-223368809 is a prime.

It is a Sophie Germain prime.

Together with 223368811, 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 (223362809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111684404 + 111684405.

It is an arithmetic number, because the mean of its divisors is an integer number (111684405).

Almost surely, 2^223368809 is an apocalyptic number.

It is an amenable number.

223368809 is a deficient number, since it is larger than the sum of its proper divisors (1).

223368809 is an equidigital number, since it uses as much as digits as its factorization.

223368809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 124416, while the sum is 41.

The square root of 223368809 is about 14945.5280602594. The cubic root of 223368809 is about 606.7468209447.

The spelling of 223368809 in words is "two hundred twenty-three million, three hundred sixty-eight thousand, eight hundred nine".