198191366 has 8 divisors (see below), whose sum is σ = 297872640. Its totient is φ = 98900488.

The previous prime is 198191363. The next prime is 198191381. The reversal of 198191366 is 663191891.

It is a happy number.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198191363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 96326 + ... + 98361.

It is an arithmetic number, because the mean of its divisors is an integer number (37234080).

Almost surely, 2^198191366 is an apocalyptic number.

198191366 is a deficient number, since it is larger than the sum of its proper divisors (99681274).

198191366 is a wasteful number, since it uses less digits than its factorization.

198191366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195198.

The product of its digits is 69984, while the sum is 44.

The square root of 198191366 is about 14078.0455319622. The cubic root of 198191366 is about 583.0353809729.

The spelling of 198191366 in words is "one hundred ninety-eight million, one hundred ninety-one thousand, three hundred sixty-six".