535809 has 4 divisors (see below), whose sum is σ = 714416. Its totient is φ = 357204.

The previous prime is 535793. The next prime is 535811. The reversal of 535809 is 908535.

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 535809 - 2⁴ = 535793 is a prime.

It is an Ulam number.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (535849) 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, 89299 + ... + 89304.

It is an arithmetic number, because the mean of its divisors is an integer number (178604).

2⁵³⁵⁸⁰⁹ is an apocalyptic number.

It is an amenable number.

535809 is a deficient number, since it is larger than the sum of its proper divisors (178607).

535809 is a wasteful number, since it uses less digits than its factorization.

535809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178606.

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 535809 is about 731.9897540267. The cubic root of 535809 is about 81.2213121600.

The spelling of 535809 in words is "five hundred thirty-five thousand, eight hundred nine".