343943213 has 2 divisors, whose sum is σ = 343943214. Its totient is φ = 343943212.

The previous prime is 343943209. The next prime is 343943221. The reversal of 343943213 is 312349343.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 253350889 + 90592324 = 15917^2 + 9518^2 .

It is a cyclic number.

It is not a de Polignac number, because 343943213 - 2² = 343943209 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 343943213.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (343943113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171971606 + 171971607.

It is an arithmetic number, because the mean of its divisors is an integer number (171971607).

Almost surely, 2^343943213 is an apocalyptic number.

It is an amenable number.

343943213 is a deficient number, since it is larger than the sum of its proper divisors (1).

343943213 is an equidigital number, since it uses as much as digits as its factorization.

343943213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23328, while the sum is 32.

The square root of 343943213 is about 18545.7060528846. The cubic root of 343943213 is about 700.6410542452.

The spelling of 343943213 in words is "three hundred forty-three million, nine hundred forty-three thousand, two hundred thirteen".