816803 has 8 divisors (see below), whose sum is σ = 891408. Its totient is φ = 743904.

The previous prime is 816779. The next prime is 816811. The reversal of 816803 is 308618.

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

It is a cyclic number.

It is not a de Polignac number, because 816803 - 2⁸ = 816547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (816883) 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, 701 + ... + 1457.

It is an arithmetic number, because the mean of its divisors is an integer number (111426).

2⁸¹⁶⁸⁰³ is an apocalyptic number.

816803 is a gapful number since it is divisible by the number (83) formed by its first and last digit.

816803 is a deficient number, since it is larger than the sum of its proper divisors (74605).

816803 is a wasteful number, since it uses less digits than its factorization.

816803 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 853.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 816803 is about 903.7715419286. The cubic root of 816803 is about 93.4772171320.

The spelling of 816803 in words is "eight hundred sixteen thousand, eight hundred three".