343030309 has 2 divisors, whose sum is σ = 343030310. Its totient is φ = 343030308.

The previous prime is 343030291. The next prime is 343030411. The reversal of 343030309 is 903030343.

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., 290873025 + 52157284 = 17055^2 + 7222^2 .

It is a cyclic number.

It is not a de Polignac number, because 343030309 - 2⁵ = 343030277 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (343030609) 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, 171515154 + 171515155.

It is an arithmetic number, because the mean of its divisors is an integer number (171515155).

Almost surely, 2^343030309 is an apocalyptic number.

It is an amenable number.

343030309 is a deficient number, since it is larger than the sum of its proper divisors (1).

343030309 is an equidigital number, since it uses as much as digits as its factorization.

343030309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2916, while the sum is 25.

The square root of 343030309 is about 18521.0774254631. The cubic root of 343030309 is about 700.0206177601.

The spelling of 343030309 in words is "three hundred forty-three million, thirty thousand, three hundred nine".