999000559 has 4 divisors (see below), whose sum is σ = 999243904. Its totient is φ = 998757216.

The previous prime is 999000521. The next prime is 999000589. The reversal of 999000559 is 955000999.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 955000999 = 449 ⋅2126951.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-999000559 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999000589) 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 in 3 ways as a sum of consecutive naturals, for example, 115407 + ... + 123760.

It is an arithmetic number, because the mean of its divisors is an integer number (249810976).

Almost surely, 2^999000559 is an apocalyptic number.

999000559 is a deficient number, since it is larger than the sum of its proper divisors (243345).

999000559 is a wasteful number, since it uses less digits than its factorization.

999000559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243344.

The product of its (nonzero) digits is 164025, while the sum is 46.

The square root of 999000559 is about 31606.9701015456. The cubic root of 999000559 is about 999.6667419514. Note that the first 3 decimals are identical.

The spelling of 999000559 in words is "nine hundred ninety-nine million, five hundred fifty-nine", and thus it is an aban number.