197359208209 has 2 divisors, whose sum is σ = 197359208210. Its totient is φ = 197359208208.

The previous prime is 197359208159. The next prime is 197359208227. The reversal of 197359208209 is 902802953791.

197359208209 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 120164142609 + 77195065600 = 346647^2 + 277840^2 .

It is an emirp because it is prime and its reverse (902802953791) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 197359208209 - 2¹⁷ = 197359077137 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 197359208209.

It is not a weakly prime, because it can be changed into another prime (197359208279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98679604104 + 98679604105.

It is an arithmetic number, because the mean of its divisors is an integer number (98679604105).

Almost surely, 2^197359208209 is an apocalyptic number.

It is an amenable number.

197359208209 is a deficient number, since it is larger than the sum of its proper divisors (1).

197359208209 is an equidigital number, since it uses as much as digits as its factorization.

197359208209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2449440, while the sum is 55.

The spelling of 197359208209 in words is "one hundred ninety-seven billion, three hundred fifty-nine million, two hundred eight thousand, two hundred nine".