197799 has 8 divisors (see below), whose sum is σ = 301440. Its totient is φ = 113016.

The previous prime is 197779. The next prime is 197803. The reversal of 197799 is 997791.

197799 = 22² + 23² + ... + 84².

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

It is not a de Polignac number, because 197799 - 2⁵ = 197767 is a prime.

It is a plaindrome in base 11.

It is a self number, because there is not a number n which added to its sum of digits gives 197799.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197759) 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, 4689 + ... + 4730.

It is an arithmetic number, because the mean of its divisors is an integer number (37680).

2¹⁹⁷⁷⁹⁹ is an apocalyptic number.

197799 is a deficient number, since it is larger than the sum of its proper divisors (103641).

197799 is an equidigital number, since it uses as much as digits as its factorization.

197799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9429.

The product of its digits is 35721, while the sum is 42.

The square root of 197799 is about 444.7459949229. The cubic root of 197799 is about 58.2650375318.

The spelling of 197799 in words is "one hundred ninety-seven thousand, seven hundred ninety-nine".