198919193 has 8 divisors (see below), whose sum is σ = 229767840. Its totient is φ = 170198080.

The previous prime is 198919187. The next prime is 198919213. The reversal of 198919193 is 391919891.

198919193 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 198919193 - 2⁶ = 198919129 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (198919793) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 531683 + ... + 532056.

It is an arithmetic number, because the mean of its divisors is an integer number (28720980).

Almost surely, 2^198919193 is an apocalyptic number.

It is an amenable number.

198919193 is a deficient number, since it is larger than the sum of its proper divisors (30848647).

198919193 is a wasteful number, since it uses less digits than its factorization.

198919193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1063767.

The product of its digits is 157464, while the sum is 50.

The square root of 198919193 is about 14103.8715606744. The cubic root of 198919193 is about 583.7482113822.

The spelling of 198919193 in words is "one hundred ninety-eight million, nine hundred nineteen thousand, one hundred ninety-three".