198203197 has 4 divisors (see below), whose sum is σ = 205037820. Its totient is φ = 191368576.

The previous prime is 198203177. The next prime is 198203207. The reversal of 198203197 is 791302891.

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

It can be written as a sum of positive squares in 2 ways, for example, as 58277956 + 139925241 = 7634^2 + 11829^2 .

It is a cyclic number.

It is not a de Polignac number, because 198203197 - 2¹⁵ = 198170429 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198203147) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3417268 + ... + 3417325.

It is an arithmetic number, because the mean of its divisors is an integer number (51259455).

Almost surely, 2^198203197 is an apocalyptic number.

It is an amenable number.

198203197 is a deficient number, since it is larger than the sum of its proper divisors (6834623).

198203197 is an equidigital number, since it uses as much as digits as its factorization.

198203197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6834622.

The product of its (nonzero) digits is 27216, while the sum is 40.

The square root of 198203197 is about 14078.4657189624. The cubic root of 198203197 is about 583.0469821415.

The spelling of 198203197 in words is "one hundred ninety-eight million, two hundred three thousand, one hundred ninety-seven".