809534 has 16 divisors (see below), whose sum is σ = 1368576. Its totient is φ = 355800.

The previous prime is 809527. The next prime is 809563. The reversal of 809534 is 435908.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 809497 and 809506.

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 809534.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 89 + ... + 1275.

It is an arithmetic number, because the mean of its divisors is an integer number (85536).

2⁸⁰⁹⁵³⁴ is an apocalyptic number.

809534 is a deficient number, since it is larger than the sum of its proper divisors (559042).

809534 is a wasteful number, since it uses less digits than its factorization.

809534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1231.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 809534 is about 899.7410738651. The cubic root of 809534 is about 93.1990955723.

The spelling of 809534 in words is "eight hundred nine thousand, five hundred thirty-four".