343212209 has 2 divisors, whose sum is σ = 343212210. Its totient is φ = 343212208.

The previous prime is 343212203. The next prime is 343212223. The reversal of 343212209 is 902212343.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 259306609 + 83905600 = 16103^2 + 9160^2 .

It is an emirp because it is prime and its reverse (902212343) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 343212209 - 2¹⁶ = 343146673 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (343212203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171606104 + 171606105.

It is an arithmetic number, because the mean of its divisors is an integer number (171606105).

Almost surely, 2^343212209 is an apocalyptic number.

It is an amenable number.

343212209 is a deficient number, since it is larger than the sum of its proper divisors (1).

343212209 is an equidigital number, since it uses as much as digits as its factorization.

343212209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 343212209 is about 18525.9873960877. The cubic root of 343212209 is about 700.1443301031.

The spelling of 343212209 in words is "three hundred forty-three million, two hundred twelve thousand, two hundred nine".