598809 has 4 divisors (see below), whose sum is σ = 798416. Its totient is φ = 399204.

The previous prime is 598799. The next prime is 598817. The reversal of 598809 is 908895.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 598809 - 2⁵ = 598777 is a prime.

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 598809.

It is not an unprimeable number, because it can be changed into a prime (590809) 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, 99799 + ... + 99804.

It is an arithmetic number, because the mean of its divisors is an integer number (199604).

2⁵⁹⁸⁸⁰⁹ is an apocalyptic number.

It is an amenable number.

598809 is a deficient number, since it is larger than the sum of its proper divisors (199607).

598809 is a wasteful number, since it uses less digits than its factorization.

598809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199606.

The product of its (nonzero) digits is 25920, while the sum is 39.

The square root of 598809 is about 773.8275001575. The cubic root of 598809 is about 84.2874224357.

The spelling of 598809 in words is "five hundred ninety-eight thousand, eight hundred nine".