198438179 has 6 divisors (see below), whose sum is σ = 199367964. Its totient is φ = 197512700.

The previous prime is 198438173. The next prime is 198438193. The reversal of 198438179 is 971834891.

It is not a de Polignac number, because 198438179 - 2²⁰ = 197389603 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (198438173) 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 5 ways as a sum of consecutive naturals, for example, 49604 + ... + 53454.

It is an arithmetic number, because the mean of its divisors is an integer number (33227994).

Almost surely, 2^198438179 is an apocalyptic number.

198438179 is a deficient number, since it is larger than the sum of its proper divisors (929785).

198438179 is an frugal number, since it uses more digits than its factorization.

198438179 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4305 (or 4078 counting only the distinct ones).

The product of its digits is 435456, while the sum is 50.

The square root of 198438179 is about 14086.8086875630. The cubic root of 198438179 is about 583.2773037523.

The spelling of 198438179 in words is "one hundred ninety-eight million, four hundred thirty-eight thousand, one hundred seventy-nine".