197963317099 has 2 divisors, whose sum is σ = 197963317100. Its totient is φ = 197963317098.

The previous prime is 197963317073. The next prime is 197963317127. The reversal of 197963317099 is 990713369791.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 197963317099 - 2²³ = 197954928491 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 197963317099.

It is not a weakly prime, because it can be changed into another prime (197963311099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98981658549 + 98981658550.

It is an arithmetic number, because the mean of its divisors is an integer number (98981658550).

Almost surely, 2^197963317099 is an apocalyptic number.

197963317099 is a deficient number, since it is larger than the sum of its proper divisors (1).

197963317099 is an equidigital number, since it uses as much as digits as its factorization.

197963317099 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17360406, while the sum is 64.

The spelling of 197963317099 in words is "one hundred ninety-seven billion, nine hundred sixty-three million, three hundred seventeen thousand, ninety-nine".