334428209 has 2 divisors, whose sum is σ = 334428210. Its totient is φ = 334428208.

The previous prime is 334428187. The next prime is 334428239. The reversal of 334428209 is 902824433.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 304397809 + 30030400 = 17447^2 + 5480^2 .

It is a cyclic number.

It is not a de Polignac number, because 334428209 - 2⁸ = 334427953 is a prime.

It is a super-2 number, since 2×334428209² = 223684453949895362, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (334428239) 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, 167214104 + 167214105.

It is an arithmetic number, because the mean of its divisors is an integer number (167214105).

Almost surely, 2^334428209 is an apocalyptic number.

It is an amenable number.

334428209 is a deficient number, since it is larger than the sum of its proper divisors (1).

334428209 is an equidigital number, since it uses as much as digits as its factorization.

334428209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 41472, while the sum is 35.

The square root of 334428209 is about 18287.3784069779. The cubic root of 334428209 is about 694.1195890828.

The spelling of 334428209 in words is "three hundred thirty-four million, four hundred twenty-eight thousand, two hundred nine".