509899 has 8 divisors (see below), whose sum is σ = 558992. Its totient is φ = 462240.

The previous prime is 509879. The next prime is 509909. The reversal of 509899 is 998905.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 509899 - 2⁵ = 509867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (509879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 472 + ... + 1114.

It is an arithmetic number, because the mean of its divisors is an integer number (69874).

2⁵⁰⁹⁸⁹⁹ is an apocalyptic number.

509899 is a deficient number, since it is larger than the sum of its proper divisors (49093).

509899 is a wasteful number, since it uses less digits than its factorization.

509899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 717.

The product of its (nonzero) digits is 29160, while the sum is 40.

The square root of 509899 is about 714.0721252087. The cubic root of 509899 is about 79.8904228959.

The spelling of 509899 in words is "five hundred nine thousand, eight hundred ninety-nine".