499989 has 16 divisors (see below), whose sum is σ = 789120. Its totient is φ = 275520.

The previous prime is 499979. The next prime is 500009. The reversal of 499989 is 989994.

It is a happy number.

It is not a de Polignac number, because 499989 - 2⁴ = 499973 is a prime.

It is a Curzon number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 499989.

It is not an unprimeable number, because it can be changed into a prime (499969) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 199 + ... + 1019.

It is an arithmetic number, because the mean of its divisors is an integer number (49320).

2⁴⁹⁹⁹⁸⁹ is an apocalyptic number.

It is an amenable number.

499989 is a deficient number, since it is larger than the sum of its proper divisors (289131).

499989 is a wasteful number, since it uses less digits than its factorization.

499989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 860.

The product of its digits is 209952, while the sum is 48.

The square root of 499989 is about 707.0990029692. The cubic root of 499989 is about 79.3694705471.

The spelling of 499989 in words is "four hundred ninety-nine thousand, nine hundred eighty-nine".