195930197 has 2 divisors, whose sum is σ = 195930198. Its totient is φ = 195930196.

The previous prime is 195930187. The next prime is 195930211. The reversal of 195930197 is 791039591.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 115756081 + 80174116 = 10759^2 + 8954^2 .

It is a cyclic number.

It is not a de Polignac number, because 195930197 - 2⁴ = 195930181 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (195930157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97965098 + 97965099.

It is an arithmetic number, because the mean of its divisors is an integer number (97965099).

Almost surely, 2^195930197 is an apocalyptic number.

It is an amenable number.

195930197 is a deficient number, since it is larger than the sum of its proper divisors (1).

195930197 is an equidigital number, since it uses as much as digits as its factorization.

195930197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 76545, while the sum is 44.

The square root of 195930197 is about 13997.5068137151. The cubic root of 195930197 is about 580.8096075716.

The spelling of 195930197 in words is "one hundred ninety-five million, nine hundred thirty thousand, one hundred ninety-seven".