9999200917 has 2 divisors, whose sum is σ = 9999200918. Its totient is φ = 9999200916.

The previous prime is 9999200873. The next prime is 9999200921. The reversal of 9999200917 is 7190029999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9347215761 + 651985156 = 96681^2 + 25534^2 .

It is a cyclic number.

It is not a de Polignac number, because 9999200917 - 2¹⁵ = 9999168149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9999200017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4999600458 + 4999600459.

It is an arithmetic number, because the mean of its divisors is an integer number (4999600459).

Almost surely, 2^9999200917 is an apocalyptic number.

It is an amenable number.

9999200917 is a deficient number, since it is larger than the sum of its proper divisors (1).

9999200917 is an equidigital number, since it uses as much as digits as its factorization.

9999200917 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 826686, while the sum is 55.

The square root of 9999200917 is about 99996.0045051801. The cubic root of 9999200917 is about 2154.3773027654.

The spelling of 9999200917 in words is "nine billion, nine hundred ninety-nine million, two hundred thousand, nine hundred seventeen".