8816813 has 4 divisors (see below), whose sum is σ = 8838780. Its totient is φ = 8794848.

The previous prime is 8816809. The next prime is 8816827. The reversal of 8816813 is 3186188.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 4502884 + 4313929 = 2122^2 + 2077^2 .

It is a cyclic number.

It is not a de Polignac number, because 8816813 - 2² = 8816809 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 (8836813) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10370 + ... + 11187.

It is an arithmetic number, because the mean of its divisors is an integer number (2209695).

Almost surely, 2^8816813 is an apocalyptic number.

It is an amenable number.

8816813 is a deficient number, since it is larger than the sum of its proper divisors (21967).

8816813 is a wasteful number, since it uses less digits than its factorization.

8816813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21966.

The product of its digits is 9216, while the sum is 35.

The square root of 8816813 is about 2969.3118731450. The cubic root of 8816813 is about 206.5874222140.

The spelling of 8816813 in words is "eight million, eight hundred sixteen thousand, eight hundred thirteen".