196863189097 has 2 divisors, whose sum is σ = 196863189098. Its totient is φ = 196863189096.

The previous prime is 196863189073. The next prime is 196863189151. The reversal of 196863189097 is 790981368691.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 155850458841 + 41012730256 = 394779^2 + 202516^2 .

It is an emirp because it is prime and its reverse (790981368691) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 196863189097 - 2³¹ = 194715705449 is a prime.

It is not a weakly prime, because it can be changed into another prime (196863189007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98431594548 + 98431594549.

It is an arithmetic number, because the mean of its divisors is an integer number (98431594549).

Almost surely, 2^196863189097 is an apocalyptic number.

It is an amenable number.

196863189097 is a deficient number, since it is larger than the sum of its proper divisors (1).

196863189097 is an equidigital number, since it uses as much as digits as its factorization.

196863189097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 35271936, while the sum is 67.

The spelling of 196863189097 in words is "one hundred ninety-six billion, eight hundred sixty-three million, one hundred eighty-nine thousand, ninety-seven".