9929985773 has 2 divisors, whose sum is σ = 9929985774. Its totient is φ = 9929985772.

The previous prime is 9929985749. The next prime is 9929985803. The reversal of 9929985773 is 3775899299.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9924542884 + 5442889 = 99622^2 + 2333^2 .

It is a cyclic number.

It is not a de Polignac number, because 9929985773 - 2¹⁶ = 9929920237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9929981773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4964992886 + 4964992887.

It is an arithmetic number, because the mean of its divisors is an integer number (4964992887).

Almost surely, 2^9929985773 is an apocalyptic number.

It is an amenable number.

9929985773 is a deficient number, since it is larger than the sum of its proper divisors (1).

9929985773 is an equidigital number, since it uses as much as digits as its factorization.

9929985773 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 77157360, while the sum is 68.

The square root of 9929985773 is about 99649.3139615120. The cubic root of 9929985773 is about 2149.3948737245.

The spelling of 9929985773 in words is "nine billion, nine hundred twenty-nine million, nine hundred eighty-five thousand, seven hundred seventy-three".