199998347 has 2 divisors, whose sum is σ = 199998348. Its totient is φ = 199998346.

The previous prime is 199998247. The next prime is 199998367. The reversal of 199998347 is 743899991.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 199998347 - 2¹² = 199994251 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (199998367) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99999173 + 99999174.

It is an arithmetic number, because the mean of its divisors is an integer number (99999174).

Almost surely, 2^199998347 is an apocalyptic number.

199998347 is a deficient number, since it is larger than the sum of its proper divisors (1).

199998347 is an equidigital number, since it uses as much as digits as its factorization.

199998347 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4408992, while the sum is 59.

The square root of 199998347 is about 14142.0771812347. The cubic root of 199998347 is about 584.8019365044.

The spelling of 199998347 in words is "one hundred ninety-nine million, nine hundred ninety-eight thousand, three hundred forty-seven".