2229809 has 2 divisors, whose sum is σ = 2229810. Its totient is φ = 2229808.

The previous prime is 2229793. The next prime is 2229823. The reversal of 2229809 is 9089222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1682209 + 547600 = 1297^2 + 740^2 .

It is a cyclic number.

It is not a de Polignac number, because 2229809 - 2⁴ = 2229793 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (2229889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1114904 + 1114905.

It is an arithmetic number, because the mean of its divisors is an integer number (1114905).

2^2229809 is an apocalyptic number.

It is an amenable number.

2229809 is a deficient number, since it is larger than the sum of its proper divisors (1).

2229809 is an equidigital number, since it uses as much as digits as its factorization.

2229809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 2229809 is about 1493.2544994073. The cubic root of 2229809 is about 130.6439255104.

The spelling of 2229809 in words is "two million, two hundred twenty-nine thousand, eight hundred nine".