198197 has 2 divisors, whose sum is σ = 198198. Its totient is φ = 198196.

The previous prime is 198193. The next prime is 198221. The reversal of 198197 is 791891.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 192721 + 5476 = 439^2 + 74^2 .

It is an emirp because it is prime and its reverse (791891) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 198197 - 2² = 198193 is a prime.

It is a Chen prime.

It is a plaindrome in base 11.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (198193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99098 + 99099.

It is an arithmetic number, because the mean of its divisors is an integer number (99099).

2¹⁹⁸¹⁹⁷ is an apocalyptic number.

It is an amenable number.

198197 is a deficient number, since it is larger than the sum of its proper divisors (1).

198197 is an equidigital number, since it uses as much as digits as its factorization.

198197 is an evil number, because the sum of its binary digits is even.

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

The square root of 198197 is about 445.1932164802. The cubic root of 198197 is about 58.3040905583.

The spelling of 198197 in words is "one hundred ninety-eight thousand, one hundred ninety-seven".