198891203 has 4 divisors (see below), whose sum is σ = 227304240. Its totient is φ = 170478168.

The previous prime is 198891197. The next prime is 198891227. The reversal of 198891203 is 302198891.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 302198891 = 499 ⋅605609.

It is not a de Polignac number, because 198891203 - 2¹² = 198887107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (198891283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14206508 + ... + 14206521.

It is an arithmetic number, because the mean of its divisors is an integer number (56826060).

Almost surely, 2^198891203 is an apocalyptic number.

198891203 is a deficient number, since it is larger than the sum of its proper divisors (28413037).

198891203 is an equidigital number, since it uses as much as digits as its factorization.

198891203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28413036.

The product of its (nonzero) digits is 31104, while the sum is 41.

The square root of 198891203 is about 14102.8792450336. The cubic root of 198891203 is about 583.7208302824.

The spelling of 198891203 in words is "one hundred ninety-eight million, eight hundred ninety-one thousand, two hundred three".