999000517 has 2 divisors, whose sum is σ = 999000518. Its totient is φ = 999000516.

The previous prime is 999000493. The next prime is 999000521. The reversal of 999000517 is 715000999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 871784676 + 127215841 = 29526^2 + 11279^2 .

It is a cyclic number.

It is not a de Polignac number, because 999000517 - 2¹⁹ = 998476229 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 999000517.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999000817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499500258 + 499500259.

It is an arithmetic number, because the mean of its divisors is an integer number (499500259).

Almost surely, 2^999000517 is an apocalyptic number.

It is an amenable number.

999000517 is a deficient number, since it is larger than the sum of its proper divisors (1).

999000517 is an equidigital number, since it uses as much as digits as its factorization.

999000517 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25515, while the sum is 40.

The square root of 999000517 is about 31606.9694371352. The cubic root of 999000517 is about 999.6667279421. Note that the first 3 decimals are identical.

The spelling of 999000517 in words is "nine hundred ninety-nine million, five hundred seventeen", and thus it is an aban number.