198001899 has 6 divisors (see below), whose sum is σ = 286002756. Its totient is φ = 132001260.

The previous prime is 198001849. The next prime is 198001919. The reversal of 198001899 is 998100891.

It is not a de Polignac number, because 198001899 - 2¹⁶ = 197936363 is a prime.

It is not an unprimeable number, because it can be changed into a prime (198001819) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11000097 + ... + 11000114.

It is an arithmetic number, because the mean of its divisors is an integer number (47667126).

Almost surely, 2^198001899 is an apocalyptic number.

198001899 is a deficient number, since it is larger than the sum of its proper divisors (88000857).

198001899 is a wasteful number, since it uses less digits than its factorization.

198001899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22000217 (or 22000214 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 45.

The square root of 198001899 is about 14071.3147573352. The cubic root of 198001899 is about 582.8495316655.

The spelling of 198001899 in words is "one hundred ninety-eight million, one thousand, eight hundred ninety-nine".