99512317973 has 2 divisors, whose sum is σ = 99512317974. Its totient is φ = 99512317972.

The previous prime is 99512317969. The next prime is 99512317997. The reversal of 99512317973 is 37971321599.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67971268369 + 31541049604 = 260713^2 + 177598^2 .

It is an emirp because it is prime and its reverse (37971321599) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 99512317973 - 2² = 99512317969 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99512317913) 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, 49756158986 + 49756158987.

It is an arithmetic number, because the mean of its divisors is an integer number (49756158987).

Almost surely, 2^99512317973 is an apocalyptic number.

It is an amenable number.

99512317973 is a deficient number, since it is larger than the sum of its proper divisors (1).

99512317973 is an equidigital number, since it uses as much as digits as its factorization.

99512317973 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3214890, while the sum is 56.

The spelling of 99512317973 in words is "ninety-nine billion, five hundred twelve million, three hundred seventeen thousand, nine hundred seventy-three".