199999343 has 2 divisors, whose sum is σ = 199999344. Its totient is φ = 199999342.

The previous prime is 199999337. The next prime is 199999357. The reversal of 199999343 is 343999991.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (343999991) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 199999343 - 2⁶ = 199999279 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199999333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99999671 + 99999672.

It is an arithmetic number, because the mean of its divisors is an integer number (99999672).

Almost surely, 2^199999343 is an apocalyptic number.

199999343 is a deficient number, since it is larger than the sum of its proper divisors (1).

199999343 is an equidigital number, since it uses as much as digits as its factorization.

199999343 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2125764, while the sum is 56.

The square root of 199999343 is about 14142.1123952541. The cubic root of 199999343 is about 584.8029072820.

The spelling of 199999343 in words is "one hundred ninety-nine million, nine hundred ninety-nine thousand, three hundred forty-three".