199998898 has 8 divisors (see below), whose sum is σ = 327270960. Its totient is φ = 90908580.

The previous prime is 199998893. The next prime is 199998901. The reversal of 199998898 is 898899991.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (199998893) 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 in 3 ways as a sum of consecutive naturals, for example, 4545408 + ... + 4545451.

It is an arithmetic number, because the mean of its divisors is an integer number (40908870).

Almost surely, 2^199998898 is an apocalyptic number.

199998898 is a deficient number, since it is larger than the sum of its proper divisors (127272062).

199998898 is a wasteful number, since it uses less digits than its factorization.

199998898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9090872.

The product of its digits is 30233088, while the sum is 70.

The square root of 199998898 is about 14142.0966620936. The cubic root of 199998898 is about 584.8024735514.

The spelling of 199998898 in words is "one hundred ninety-nine million, nine hundred ninety-eight thousand, eight hundred ninety-eight".