191798 has 8 divisors (see below), whose sum is σ = 294840. Its totient is φ = 93520.

The previous prime is 191791. The next prime is 191801. The reversal of 191798 is 897191.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191791) by changing a digit.

191798 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 3 ways as a sum of consecutive naturals, for example, 1088 + ... + 1251.

It is an arithmetic number, because the mean of its divisors is an integer number (36855).

2¹⁹¹⁷⁹⁸ is an apocalyptic number.

191798 is a deficient number, since it is larger than the sum of its proper divisors (103042).

191798 is a wasteful number, since it uses less digits than its factorization.

191798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2382.

The product of its digits is 4536, while the sum is 35.

The square root of 191798 is about 437.9474854363. The cubic root of 191798 is about 57.6697441566.

It can be divided in two parts, 191 and 798, that added together give a palindrome (989).

The spelling of 191798 in words is "one hundred ninety-one thousand, seven hundred ninety-eight".