8821813 has 24 divisors (see below), whose sum is σ = 12065760. Its totient is φ = 6340320.

The previous prime is 8821807. The next prime is 8821817. The reversal of 8821813 is 3181288.

It is not a de Polignac number, because 8821813 - 2¹⁷ = 8690741 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8821817) 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 23 ways as a sum of consecutive naturals, for example, 6378 + ... + 7636.

It is an arithmetic number, because the mean of its divisors is an integer number (502740).

Almost surely, 2^8821813 is an apocalyptic number.

It is an amenable number.

8821813 is a deficient number, since it is larger than the sum of its proper divisors (3243947).

8821813 is a wasteful number, since it uses less digits than its factorization.

8821813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1297 (or 1290 counting only the distinct ones).

The product of its digits is 3072, while the sum is 31.

The square root of 8821813 is about 2970.1536997267. The cubic root of 8821813 is about 206.6264666289.

The spelling of 8821813 in words is "eight million, eight hundred twenty-one thousand, eight hundred thirteen".