816843 has 16 divisors (see below), whose sum is σ = 1159200. Its totient is φ = 510720.

The previous prime is 816841. The next prime is 816847. The reversal of 816843 is 348618.

It is a happy number.

It is not a de Polignac number, because 816843 - 2¹ = 816841 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 816843.

It is not an unprimeable number, because it can be changed into a prime (816841) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3453 + ... + 3681.

It is an arithmetic number, because the mean of its divisors is an integer number (72450).

2⁸¹⁶⁸⁴³ is an apocalyptic number.

816843 is a deficient number, since it is larger than the sum of its proper divisors (342357).

816843 is a wasteful number, since it uses less digits than its factorization.

816843 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302.

The product of its digits is 4608, while the sum is 30.

The square root of 816843 is about 903.7936711440. The cubic root of 816843 is about 93.4787430110.

The spelling of 816843 in words is "eight hundred sixteen thousand, eight hundred forty-three".