343194809 has 2 divisors, whose sum is σ = 343194810. Its totient is φ = 343194808.

The previous prime is 343194781. The next prime is 343194883. The reversal of 343194809 is 908491343.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 205836409 + 137358400 = 14347^2 + 11720^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-343194809 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (343194889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171597404 + 171597405.

It is an arithmetic number, because the mean of its divisors is an integer number (171597405).

Almost surely, 2^343194809 is an apocalyptic number.

It is an amenable number.

343194809 is a deficient number, since it is larger than the sum of its proper divisors (1).

343194809 is an equidigital number, since it uses as much as digits as its factorization.

343194809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 93312, while the sum is 41.

The square root of 343194809 is about 18525.5177795386. The cubic root of 343194809 is about 700.1324980481.

The spelling of 343194809 in words is "three hundred forty-three million, one hundred ninety-four thousand, eight hundred nine".