195903207317 has 2 divisors, whose sum is σ = 195903207318. Its totient is φ = 195903207316.

The previous prime is 195903207301. The next prime is 195903207373. The reversal of 195903207317 is 713702309591.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 163987742116 + 31915465201 = 404954^2 + 178649^2 .

It is a cyclic number.

It is not a de Polignac number, because 195903207317 - 2⁴ = 195903207301 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (195903807317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97951603658 + 97951603659.

It is an arithmetic number, because the mean of its divisors is an integer number (97951603659).

Almost surely, 2^195903207317 is an apocalyptic number.

It is an amenable number.

195903207317 is a deficient number, since it is larger than the sum of its proper divisors (1).

195903207317 is an equidigital number, since it uses as much as digits as its factorization.

195903207317 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 357210, while the sum is 47.

The spelling of 195903207317 in words is "one hundred ninety-five billion, nine hundred three million, two hundred seven thousand, three hundred seventeen".