343199809 has 2 divisors, whose sum is σ = 343199810. Its totient is φ = 343199808.

The previous prime is 343199777. The next prime is 343199837. The reversal of 343199809 is 908991343.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 220433409 + 122766400 = 14847^2 + 11080^2 .

It is a cyclic number.

It is not a de Polignac number, because 343199809 - 2⁵ = 343199777 is a prime.

It is a super-2 number, since 2×343199809² = 235572217795272962, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (343199839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171599904 + 171599905.

It is an arithmetic number, because the mean of its divisors is an integer number (171599905).

Almost surely, 2^343199809 is an apocalyptic number.

It is an amenable number.

343199809 is a deficient number, since it is larger than the sum of its proper divisors (1).

343199809 is an equidigital number, since it uses as much as digits as its factorization.

343199809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 209952, while the sum is 46.

The square root of 343199809 is about 18525.6527280417. The cubic root of 343199809 is about 700.1358981048.

The spelling of 343199809 in words is "three hundred forty-three million, one hundred ninety-nine thousand, eight hundred nine".