8821979 has 2 divisors, whose sum is σ = 8821980. Its totient is φ = 8821978.

The previous prime is 8821973. The next prime is 8821991. The reversal of 8821979 is 9791288.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8821979 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (8821973) 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, 4410989 + 4410990.

It is an arithmetic number, because the mean of its divisors is an integer number (4410990).

Almost surely, 2^8821979 is an apocalyptic number.

8821979 is a deficient number, since it is larger than the sum of its proper divisors (1).

8821979 is an equidigital number, since it uses as much as digits as its factorization.

8821979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72576, while the sum is 44.

The square root of 8821979 is about 2970.1816442770. The cubic root of 8821979 is about 206.6277626504.

The spelling of 8821979 in words is "eight million, eight hundred twenty-one thousand, nine hundred seventy-nine".