198943085 has 8 divisors (see below), whose sum is σ = 260434656. Its totient is φ = 144685840.

The previous prime is 198943013. The next prime is 198943127. The reversal of 198943085 is 580349891.

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

It is not a de Polignac number, because 198943085 - 2²⁰ = 197894509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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, 1808519 + ... + 1808628.

It is an arithmetic number, because the mean of its divisors is an integer number (32554332).

Almost surely, 2^198943085 is an apocalyptic number.

It is an amenable number.

198943085 is a deficient number, since it is larger than the sum of its proper divisors (61491571).

198943085 is a wasteful number, since it uses less digits than its factorization.

198943085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3617163.

The product of its (nonzero) digits is 311040, while the sum is 47.

The square root of 198943085 is about 14104.7185367167. The cubic root of 198943085 is about 583.7715815989.

The spelling of 198943085 in words is "one hundred ninety-eight million, nine hundred forty-three thousand, eighty-five".