804813 has 4 divisors (see below), whose sum is σ = 1073088. Its totient is φ = 536540.

The previous prime is 804803. The next prime is 804823. The reversal of 804813 is 318408.

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 an interprime number because it is at equal distance from previous prime (804803) and next prime (804823).

It is a cyclic number.

It is not a de Polignac number, because 804813 - 2¹⁴ = 788429 is a prime.

It is a D-number.

It is a Curzon number.

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 804813.

It is not an unprimeable number, because it can be changed into a prime (804803) 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 3 ways as a sum of consecutive naturals, for example, 134133 + ... + 134138.

It is an arithmetic number, because the mean of its divisors is an integer number (268272).

2⁸⁰⁴⁸¹³ is an apocalyptic number.

It is an amenable number.

804813 is a deficient number, since it is larger than the sum of its proper divisors (268275).

804813 is a wasteful number, since it uses less digits than its factorization.

804813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268274.

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 804813 is about 897.1137051679. The cubic root of 804813 is about 93.0175709661.

The spelling of 804813 in words is "eight hundred four thousand, eight hundred thirteen".