198771 has 8 divisors (see below), whose sum is σ = 269760. Its totient is φ = 130152.

The previous prime is 198769. The next prime is 198811. The reversal of 198771 is 177891.

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

It is not a de Polignac number, because 198771 - 2¹ = 198769 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198701) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 385 + ... + 738.

It is an arithmetic number, because the mean of its divisors is an integer number (33720).

2¹⁹⁸⁷⁷¹ is an apocalyptic number.

198771 is a deficient number, since it is larger than the sum of its proper divisors (70989).

198771 is a wasteful number, since it uses less digits than its factorization.

198771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1185.

The product of its digits is 3528, while the sum is 33.

The square root of 198771 is about 445.8374143115. The cubic root of 198771 is about 58.3603212989.

It can be divided in two parts, 198 and 771, that added together give a palindrome (969).

The spelling of 198771 in words is "one hundred ninety-eight thousand, seven hundred seventy-one".