343620209 has 2 divisors, whose sum is σ = 343620210. Its totient is φ = 343620208.

The previous prime is 343620197. The next prime is 343620223. The reversal of 343620209 is 902026343.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 343546225 + 73984 = 18535^2 + 272^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-343620209 is a prime.

It is not a weakly prime, because it can be changed into another prime (343620289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171810104 + 171810105.

It is an arithmetic number, because the mean of its divisors is an integer number (171810105).

Almost surely, 2^343620209 is an apocalyptic number.

It is an amenable number.

343620209 is a deficient number, since it is larger than the sum of its proper divisors (1).

343620209 is an equidigital number, since it uses as much as digits as its factorization.

343620209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 29.

The square root of 343620209 is about 18536.9956843066. The cubic root of 343620209 is about 700.4216568412.

The spelling of 343620209 in words is "three hundred forty-three million, six hundred twenty thousand, two hundred nine".