999990000017 has 2 divisors, whose sum is σ = 999990000018. Its totient is φ = 999990000016.

The previous prime is 999989999993. The next prime is 999990000067. The reversal of 999990000017 is 710000099999.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 656762747281 + 343227252736 = 810409^2 + 585856^2 .

It is an emirp because it is prime and its reverse (710000099999) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 999990000017 - 2¹⁶ = 999989934481 is a prime.

It is not a weakly prime, because it can be changed into another prime (999990000067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499995000008 + 499995000009.

It is an arithmetic number, because the mean of its divisors is an integer number (499995000009).

Almost surely, 2^999990000017 is an apocalyptic number.

It is an amenable number.

999990000017 is a deficient number, since it is larger than the sum of its proper divisors (1).

999990000017 is an equidigital number, since it uses as much as digits as its factorization.

999990000017 is an evil number, because the sum of its binary digits is even.

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

The spelling of 999990000017 in words is "nine hundred ninety-nine billion, nine hundred ninety million, seventeen", and thus it is an aban number.