999028489 has 4 divisors (see below), whose sum is σ = 999193924. Its totient is φ = 998863056.

The previous prime is 999028487. The next prime is 999028519. The reversal of 999028489 is 984820999.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 984820999 = 17 ⋅57930647.

It can be written as a sum of positive squares in 2 ways, for example, as 746218489 + 252810000 = 27317^2 + 15900^2 .

It is a cyclic number.

It is not a de Polignac number, because 999028489 - 2¹ = 999028487 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (999028487) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73302 + ... + 85855.

It is an arithmetic number, because the mean of its divisors is an integer number (249798481).

Almost surely, 2^999028489 is an apocalyptic number.

It is an amenable number.

999028489 is a deficient number, since it is larger than the sum of its proper divisors (165435).

999028489 is a wasteful number, since it uses less digits than its factorization.

999028489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165434.

The product of its (nonzero) digits is 3359232, while the sum is 58.

The square root of 999028489 is about 31607.4119313809. The cubic root of 999028489 is about 999.6760580730.

The spelling of 999028489 in words is "nine hundred ninety-nine million, twenty-eight thousand, four hundred eighty-nine".