198193171 has 8 divisors (see below), whose sum is σ = 216313344. Its totient is φ = 180090120.

The previous prime is 198193133. The next prime is 198193187. The reversal of 198193171 is 171391891.

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

It is a cyclic number.

It is not a de Polignac number, because 198193171 - 2⁷ = 198193043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (198193271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39046 + ... + 43828.

It is an arithmetic number, because the mean of its divisors is an integer number (27039168).

Almost surely, 2^198193171 is an apocalyptic number.

198193171 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

198193171 is a deficient number, since it is larger than the sum of its proper divisors (18120173).

198193171 is a wasteful number, since it uses less digits than its factorization.

198193171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8561.

The product of its digits is 13608, while the sum is 40.

The square root of 198193171 is about 14078.1096387264. The cubic root of 198193171 is about 583.0371509385.

The spelling of 198193171 in words is "one hundred ninety-eight million, one hundred ninety-three thousand, one hundred seventy-one".