804999 has 8 divisors (see below), whose sum is σ = 1155952. Its totient is φ = 495360.

The previous prime is 804997. The next prime is 805019. The reversal of 804999 is 999408.

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

It is not a de Polignac number, because 804999 - 2¹ = 804997 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 20641 = 804999 / (8 + 0 + 4 + 9 + 9 + 9).

It is a Duffinian number.

804999 is a modest number, since divided by 999 gives 804 as remainder.

804999 is a lucky 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 804999.

It is not an unprimeable number, because it can be changed into a prime (804997) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10282 + ... + 10359.

It is an arithmetic number, because the mean of its divisors is an integer number (144494).

2⁸⁰⁴⁹⁹⁹ is an apocalyptic number.

804999 is a deficient number, since it is larger than the sum of its proper divisors (350953).

804999 is a wasteful number, since it uses less digits than its factorization.

804999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20657.

The product of its (nonzero) digits is 23328, while the sum is 39.

The square root of 804999 is about 897.2173649679. The cubic root of 804999 is about 93.0247361649.

It can be divided in two parts, 80499 and 9, that added together give a palindrome (80508).

The spelling of 804999 in words is "eight hundred four thousand, nine hundred ninety-nine".