9999000917 has 2 divisors, whose sum is σ = 9999000918. Its totient is φ = 9999000916.

The previous prime is 9999000901. The next prime is 9999000983. The reversal of 9999000917 is 7190009999.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8145784516 + 1853216401 = 90254^2 + 43049^2 .

It is an emirp because it is prime and its reverse (7190009999) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9999000917 - 2⁴ = 9999000901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9999200917) 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, 4999500458 + 4999500459.

It is an arithmetic number, because the mean of its divisors is an integer number (4999500459).

Almost surely, 2^9999000917 is an apocalyptic number.

It is an amenable number.

9999000917 is a deficient number, since it is larger than the sum of its proper divisors (1).

9999000917 is an equidigital number, since it uses as much as digits as its factorization.

9999000917 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 413343, while the sum is 53.

The square root of 9999000917 is about 99995.0044602229. The cubic root of 9999000917 is about 2154.3629390065.

The spelling of 9999000917 in words is "nine billion, nine hundred ninety-nine million, nine hundred seventeen", and thus it is an aban number.