198338171 has 4 divisors (see below), whose sum is σ = 199434144. Its totient is φ = 197242200.

The previous prime is 198338113. The next prime is 198338183. The reversal of 198338171 is 171833891.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 198338171 - 2²² = 194143867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (198338071) 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 3 ways as a sum of consecutive naturals, for example, 547715 + ... + 548076.

It is an arithmetic number, because the mean of its divisors is an integer number (49858536).

Almost surely, 2^198338171 is an apocalyptic number.

198338171 is a deficient number, since it is larger than the sum of its proper divisors (1095973).

198338171 is a wasteful number, since it uses less digits than its factorization.

198338171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1095972.

The product of its digits is 36288, while the sum is 41.

The square root of 198338171 is about 14083.2585362905. The cubic root of 198338171 is about 583.1793014441.

The spelling of 198338171 in words is "one hundred ninety-eight million, three hundred thirty-eight thousand, one hundred seventy-one".