198119791 has 8 divisors (see below), whose sum is σ = 209268224. Its totient is φ = 187268760.

The previous prime is 198119743. The next prime is 198119807. The reversal of 198119791 is 197911891.

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 198119791 - 2¹¹ = 198117743 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 (198116791) 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 7 ways as a sum of consecutive naturals, for example, 72981 + ... + 75646.

It is an arithmetic number, because the mean of its divisors is an integer number (26158528).

Almost surely, 2^198119791 is an apocalyptic number.

198119791 is a deficient number, since it is larger than the sum of its proper divisors (11148433).

198119791 is a wasteful number, since it uses less digits than its factorization.

198119791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148701.

The product of its digits is 40824, while the sum is 46.

The square root of 198119791 is about 14075.5032236862. The cubic root of 198119791 is about 582.9651865563.

The spelling of 198119791 in words is "one hundred ninety-eight million, one hundred nineteen thousand, seven hundred ninety-one".