810799 has 4 divisors (see below), whose sum is σ = 884520. Its totient is φ = 737080.

The previous prime is 810791. The next prime is 810809. The reversal of 810799 is 997018.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 810799 - 2³ = 810791 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (810791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36844 + ... + 36865.

It is an arithmetic number, because the mean of its divisors is an integer number (221130).

2⁸¹⁰⁷⁹⁹ is an apocalyptic number.

810799 is a deficient number, since it is larger than the sum of its proper divisors (73721).

810799 is a wasteful number, since it uses less digits than its factorization.

810799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73720.

The product of its (nonzero) digits is 4536, while the sum is 34.

The square root of 810799 is about 900.4437794777. The cubic root of 810799 is about 93.2476154613.

The spelling of 810799 in words is "eight hundred ten thousand, seven hundred ninety-nine".