198291171 has 16 divisors (see below), whose sum is σ = 287495936. Its totient is φ = 120838176.

The previous prime is 198291161. The next prime is 198291187. The reversal of 198291171 is 171192891.

It is not a de Polignac number, because 198291171 - 2⁵ = 198291139 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (198291101) 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 15 ways as a sum of consecutive naturals, for example, 20665 + ... + 28698.

It is an arithmetic number, because the mean of its divisors is an integer number (17968496).

Almost surely, 2^198291171 is an apocalyptic number.

198291171 is a deficient number, since it is larger than the sum of its proper divisors (89204765).

198291171 is a wasteful number, since it uses less digits than its factorization.

198291171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49482.

The product of its digits is 9072, while the sum is 39.

The square root of 198291171 is about 14081.5897895089. The cubic root of 198291171 is about 583.1332326644.

The spelling of 198291171 in words is "one hundred ninety-eight million, two hundred ninety-one thousand, one hundred seventy-one".