223409909 has 2 divisors, whose sum is σ = 223409910. Its totient is φ = 223409908.

The previous prime is 223409899. The next prime is 223409933. The reversal of 223409909 is 909904322.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 221712100 + 1697809 = 14890^2 + 1303^2 .

It is a cyclic number.

It is not a de Polignac number, because 223409909 - 2²⁰ = 222361333 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (223409969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111704954 + 111704955.

It is an arithmetic number, because the mean of its divisors is an integer number (111704955).

Almost surely, 2^223409909 is an apocalyptic number.

It is an amenable number.

223409909 is a deficient number, since it is larger than the sum of its proper divisors (1).

223409909 is an equidigital number, since it uses as much as digits as its factorization.

223409909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34992, while the sum is 38.

The square root of 223409909 is about 14946.9029902519. The cubic root of 223409909 is about 606.7840325935.

The spelling of 223409909 in words is "two hundred twenty-three million, four hundred nine thousand, nine hundred nine".