198768843 has 96 divisors (see below), whose sum is σ = 374784000. Its totient is φ = 104019552.

The previous prime is 198768841. The next prime is 198768851. The reversal of 198768843 is 348867891.

It is not a de Polignac number, because 198768843 - 2¹ = 198768841 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 198768843.

It is not an unprimeable number, because it can be changed into a prime (198768841) 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 95 ways as a sum of consecutive naturals, for example, 1565046 + ... + 1565172.

It is an arithmetic number, because the mean of its divisors is an integer number (3904000).

Almost surely, 2^198768843 is an apocalyptic number.

198768843 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

198768843 is a deficient number, since it is larger than the sum of its proper divisors (176015157).

198768843 is a wasteful number, since it uses less digits than its factorization.

198768843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183 (or 150 counting only the distinct ones).

The product of its digits is 2322432, while the sum is 54.

The square root of 198768843 is about 14098.5404563735. The cubic root of 198768843 is about 583.6011019557.

The spelling of 198768843 in words is "one hundred ninety-eight million, seven hundred sixty-eight thousand, eight hundred forty-three".