199998235 has 4 divisors (see below), whose sum is σ = 239997888. Its totient is φ = 159998584.

The previous prime is 199998221. The next prime is 199998241. The reversal of 199998235 is 532899991.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 199998235 - 2⁷ = 199998107 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 19999819 + ... + 19999828.

It is an arithmetic number, because the mean of its divisors is an integer number (59999472).

Almost surely, 2^199998235 is an apocalyptic number.

199998235 is a deficient number, since it is larger than the sum of its proper divisors (39999653).

199998235 is an equidigital number, since it uses as much as digits as its factorization.

199998235 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39999652.

The product of its digits is 1574640, while the sum is 55.

The square root of 199998235 is about 14142.0732214198. The cubic root of 199998235 is about 584.8018273404.

The spelling of 199998235 in words is "one hundred ninety-nine million, nine hundred ninety-eight thousand, two hundred thirty-five".