199999898 has 16 divisors (see below), whose sum is σ = 344359680. Its totient is φ = 85338576.

The previous prime is 199999889. The next prime is 199999901. The reversal of 199999898 is 898999991.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27986 + ... + 34397.

It is an arithmetic number, because the mean of its divisors is an integer number (21522480).

Almost surely, 2^199999898 is an apocalyptic number.

199999898 is a deficient number, since it is larger than the sum of its proper divisors (144359782).

199999898 is a wasteful number, since it uses less digits than its factorization.

199999898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62621.

The product of its digits is 34012224, while the sum is 71.

The square root of 199999898 is about 14142.1320174859. The cubic root of 199999898 is about 584.8034482260.

The spelling of 199999898 in words is "one hundred ninety-nine million, nine hundred ninety-nine thousand, eight hundred ninety-eight".