99999918313 has 2 divisors, whose sum is σ = 99999918314. Its totient is φ = 99999918312.

The previous prime is 99999918289. The next prime is 99999918379. The reversal of 99999918313 is 31381999999.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 83444721424 + 16555196889 = 288868^2 + 128667^2 .

It is a cyclic number.

It is not a de Polignac number, because 99999918313 - 2²⁹ = 99463047401 is a prime.

It is not a weakly prime, because it can be changed into another prime (99999918713) 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, 49999959156 + 49999959157.

It is an arithmetic number, because the mean of its divisors is an integer number (49999959157).

Almost surely, 2^99999918313 is an apocalyptic number.

It is an amenable number.

99999918313 is a deficient number, since it is larger than the sum of its proper divisors (1).

99999918313 is an equidigital number, since it uses as much as digits as its factorization.

99999918313 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 38263752, while the sum is 70.

The spelling of 99999918313 in words is "ninety-nine billion, nine hundred ninety-nine million, nine hundred eighteen thousand, three hundred thirteen".