8421911 has 2 divisors, whose sum is σ = 8421912. Its totient is φ = 8421910.

The previous prime is 8421901. The next prime is 8421923. The reversal of 8421911 is 1191248.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8421911 - 2¹⁰ = 8420887 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8421901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4210955 + 4210956.

It is an arithmetic number, because the mean of its divisors is an integer number (4210956).

Almost surely, 2^8421911 is an apocalyptic number.

8421911 is a deficient number, since it is larger than the sum of its proper divisors (1).

8421911 is an equidigital number, since it uses as much as digits as its factorization.

8421911 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 576, while the sum is 26.

The square root of 8421911 is about 2902.0528940734. The cubic root of 8421911 is about 203.4558660054.

The spelling of 8421911 in words is "eight million, four hundred twenty-one thousand, nine hundred eleven".