343238309 has 2 divisors, whose sum is σ = 343238310. Its totient is φ = 343238308.

The previous prime is 343238303. The next prime is 343238339. The reversal of 343238309 is 903832343.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 295324225 + 47914084 = 17185^2 + 6922^2 .

It is a cyclic number.

It is not a de Polignac number, because 343238309 - 2⁸ = 343238053 is a prime.

It is a Chen prime.

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

It is equal to p_18459602 and since 343238309 and 18459602 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (343238303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171619154 + 171619155.

It is an arithmetic number, because the mean of its divisors is an integer number (171619155).

Almost surely, 2^343238309 is an apocalyptic number.

It is an amenable number.

343238309 is a deficient number, since it is larger than the sum of its proper divisors (1).

343238309 is an equidigital number, since it uses as much as digits as its factorization.

343238309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46656, while the sum is 35.

The square root of 343238309 is about 18526.6917985916. The cubic root of 343238309 is about 700.1620774358.

The spelling of 343238309 in words is "three hundred forty-three million, two hundred thirty-eight thousand, three hundred nine".