198862171 has 4 divisors (see below), whose sum is σ = 199315600. Its totient is φ = 198408744.

The previous prime is 198862129. The next prime is 198862187. The reversal of 198862171 is 171268891.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 171268891 = 5387 ⋅31793.

It is a cyclic number.

It is not a de Polignac number, because 198862171 - 2⁷ = 198862043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (198862121) 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, 226056 + ... + 226933.

It is an arithmetic number, because the mean of its divisors is an integer number (49828900).

Almost surely, 2^198862171 is an apocalyptic number.

198862171 is a deficient number, since it is larger than the sum of its proper divisors (453429).

198862171 is an equidigital number, since it uses as much as digits as its factorization.

198862171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 453428.

The product of its digits is 48384, while the sum is 43.

The square root of 198862171 is about 14101.8499141070. The cubic root of 198862171 is about 583.6924271361.

The spelling of 198862171 in words is "one hundred ninety-eight million, eight hundred sixty-two thousand, one hundred seventy-one".