530809 has 4 divisors (see below), whose sum is σ = 532980. Its totient is φ = 528640.

The previous prime is 530807. The next prime is 530833. The reversal of 530809 is 908035.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 908035 = 5 ⋅181607.

It can be written as a sum of positive squares in 2 ways, for example, as 308025 + 222784 = 555^2 + 472^2 .

It is a cyclic number.

It is not a de Polignac number, because 530809 - 2¹ = 530807 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (530807) 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, 664 + ... + 1225.

It is an arithmetic number, because the mean of its divisors is an integer number (133245).

2⁵³⁰⁸⁰⁹ is an apocalyptic number.

It is an amenable number.

530809 is a deficient number, since it is larger than the sum of its proper divisors (2171).

530809 is a wasteful number, since it uses less digits than its factorization.

530809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2170.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 530809 is about 728.5664005429. The cubic root of 530809 is about 80.9678783369.

The spelling of 530809 in words is "five hundred thirty thousand, eight hundred nine".