195738161 has 2 divisors, whose sum is σ = 195738162. Its totient is φ = 195738160.

The previous prime is 195738089. The next prime is 195738163. The reversal of 195738161 is 161837591.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 147865600 + 47872561 = 12160^2 + 6919^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-195738161 is a prime.

Together with 195738163, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (195738163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97869080 + 97869081.

It is an arithmetic number, because the mean of its divisors is an integer number (97869081).

Almost surely, 2^195738161 is an apocalyptic number.

It is an amenable number.

195738161 is a deficient number, since it is larger than the sum of its proper divisors (1).

195738161 is an equidigital number, since it uses as much as digits as its factorization.

195738161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 45360, while the sum is 41.

The square root of 195738161 is about 13990.6454818925. The cubic root of 195738161 is about 580.6197902877.

The spelling of 195738161 in words is "one hundred ninety-five million, seven hundred thirty-eight thousand, one hundred sixty-one".