999928020017 has 2 divisors, whose sum is σ = 999928020018. Its totient is φ = 999928020016.

The previous prime is 999928020001. The next prime is 999928020031. The reversal of 999928020017 is 710020829999.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 850925071936 + 149002948081 = 922456^2 + 386009^2 .

It is a cyclic number.

It is not a de Polignac number, because 999928020017 - 2⁴ = 999928020001 is a prime.

It is not a weakly prime, because it can be changed into another prime (999928020067) 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, 499964010008 + 499964010009.

It is an arithmetic number, because the mean of its divisors is an integer number (499964010009).

Almost surely, 2^999928020017 is an apocalyptic number.

It is an amenable number.

999928020017 is a deficient number, since it is larger than the sum of its proper divisors (1).

999928020017 is an equidigital number, since it uses as much as digits as its factorization.

999928020017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1469664, while the sum is 56.

The spelling of 999928020017 in words is "nine hundred ninety-nine billion, nine hundred twenty-eight million, twenty thousand, seventeen".