810609 has 8 divisors (see below), whose sum is σ = 1104000. Its totient is φ = 528816.

The previous prime is 810587. The next prime is 810643. The reversal of 810609 is 906018.

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

It is not a de Polignac number, because 810609 - 2⁸ = 810353 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (810659) by changing a digit.

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, 2734 + ... + 3015.

It is an arithmetic number, because the mean of its divisors is an integer number (138000).

2⁸¹⁰⁶⁰⁹ is an apocalyptic number.

It is an amenable number.

810609 is a deficient number, since it is larger than the sum of its proper divisors (293391).

810609 is a wasteful number, since it uses less digits than its factorization.

810609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5799.

The product of its (nonzero) digits is 432, while the sum is 24.

The square root of 810609 is about 900.3382697631. The cubic root of 810609 is about 93.2403311113.

The spelling of 810609 in words is "eight hundred ten thousand, six hundred nine".