195999999997 has 2 divisors, whose sum is σ = 195999999998. Its totient is φ = 195999999996.

The previous prime is 195999999983. The next prime is 196000000081. The reversal of 195999999997 is 799999999591.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 117574237881 + 78425762116 = 342891^2 + 280046^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-195999999997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (195999999947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97999999998 + 97999999999.

It is an arithmetic number, because the mean of its divisors is an integer number (97999999999).

Almost surely, 2^195999999997 is an apocalyptic number.

It is an amenable number.

195999999997 is a deficient number, since it is larger than the sum of its proper divisors (1).

195999999997 is an equidigital number, since it uses as much as digits as its factorization.

195999999997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13559717115, while the sum is 94.

The spelling of 195999999997 in words is "one hundred ninety-five billion, nine hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred ninety-seven".