197597 has 2 divisors, whose sum is σ = 197598. Its totient is φ = 197596.

The previous prime is 197573. The next prime is 197599. The reversal of 197597 is 795791.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 164836 + 32761 = 406^2 + 181^2 .

It is an emirp because it is prime and its reverse (795791) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 197597 - 2⁸ = 197341 is a prime.

Together with 197599, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 197597.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (197599) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98798 + 98799.

It is an arithmetic number, because the mean of its divisors is an integer number (98799).

2¹⁹⁷⁵⁹⁷ is an apocalyptic number.

It is an amenable number.

197597 is a deficient number, since it is larger than the sum of its proper divisors (1).

197597 is an equidigital number, since it uses as much as digits as its factorization.

197597 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19845, while the sum is 38.

The square root of 197597 is about 444.5188409955. The cubic root of 197597 is about 58.2451966051.

The spelling of 197597 in words is "one hundred ninety-seven thousand, five hundred ninety-seven".