318346205197 has 2 divisors, whose sum is σ = 318346205198. Its totient is φ = 318346205196.

The previous prime is 318346205159. The next prime is 318346205201. The reversal of 318346205197 is 791502643813.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 305378917321 + 12967287876 = 552611^2 + 113874^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-318346205197 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 318346205197.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (318346205147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159173102598 + 159173102599.

It is an arithmetic number, because the mean of its divisors is an integer number (159173102599).

It is a 1-persistent number, because it is pandigital, but 2⋅318346205197 = 636692410394 is not.

Almost surely, 2^318346205197 is an apocalyptic number.

It is an amenable number.

318346205197 is a deficient number, since it is larger than the sum of its proper divisors (1).

318346205197 is an equidigital number, since it uses as much as digits as its factorization.

318346205197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1088640, while the sum is 49.

The spelling of 318346205197 in words is "three hundred eighteen billion, three hundred forty-six million, two hundred five thousand, one hundred ninety-seven".