8858821 has 2 divisors, whose sum is σ = 8858822. Its totient is φ = 8858820.

The previous prime is 8858813. The next prime is 8858881. The reversal of 8858821 is 1288588.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7672900 + 1185921 = 2770^2 + 1089^2 .

It is a cyclic number.

It is not a de Polignac number, because 8858821 - 2³ = 8858813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8858881) 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 as a sum of consecutive naturals, namely, 4429410 + 4429411.

It is an arithmetic number, because the mean of its divisors is an integer number (4429411).

Almost surely, 2^8858821 is an apocalyptic number.

It is an amenable number.

8858821 is a deficient number, since it is larger than the sum of its proper divisors (1).

8858821 is an equidigital number, since it uses as much as digits as its factorization.

8858821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40960, while the sum is 40.

The square root of 8858821 is about 2976.3771602403. The cubic root of 8858821 is about 206.9150000692.

The spelling of 8858821 in words is "eight million, eight hundred fifty-eight thousand, eight hundred twenty-one".