198711 has 6 divisors (see below), whose sum is σ = 287040. Its totient is φ = 132468.

The previous prime is 198701. The next prime is 198719. The reversal of 198711 is 117891.

It is not a de Polignac number, because 198711 - 2⁶ = 198647 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198719) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11031 + ... + 11048.

It is an arithmetic number, because the mean of its divisors is an integer number (47840).

2¹⁹⁸⁷¹¹ is an apocalyptic number.

198711 is a deficient number, since it is larger than the sum of its proper divisors (88329).

198711 is a wasteful number, since it uses less digits than its factorization.

198711 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22085 (or 22082 counting only the distinct ones).

The product of its digits is 504, while the sum is 27.

The square root of 198711 is about 445.7701201292. The cubic root of 198711 is about 58.3544485917.

It can be divided in two parts, 198 and 711, that added together give a palindrome (909).

The spelling of 198711 in words is "one hundred ninety-eight thousand, seven hundred eleven".