8826821 has 2 divisors, whose sum is σ = 8826822. Its totient is φ = 8826820.

The previous prime is 8826809. The next prime is 8826823. The reversal of 8826821 is 1286288.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8352100 + 474721 = 2890^2 + 689^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8826821 is a prime.

Together with 8826823, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8826823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4413410 + 4413411.

It is an arithmetic number, because the mean of its divisors is an integer number (4413411).

Almost surely, 2^8826821 is an apocalyptic number.

It is an amenable number.

8826821 is a deficient number, since it is larger than the sum of its proper divisors (1).

8826821 is an equidigital number, since it uses as much as digits as its factorization.

8826821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12288, while the sum is 35.

The square root of 8826821 is about 2970.9966341280. The cubic root of 8826821 is about 206.6655587292.

The spelling of 8826821 in words is "eight million, eight hundred twenty-six thousand, eight hundred twenty-one".