8421983 has 2 divisors, whose sum is σ = 8421984. Its totient is φ = 8421982.

The previous prime is 8421971. The next prime is 8421989. The reversal of 8421983 is 3891248.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8421983 - 2⁸ = 8421727 is a prime.

It is a d-powerful number, because it can be written as 8³ + 4 + 2²³ + 1 + 9 + 8⁵ + 3⁴ .

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8421989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4210991 + 4210992.

It is an arithmetic number, because the mean of its divisors is an integer number (4210992).

Almost surely, 2^8421983 is an apocalyptic number.

8421983 is a deficient number, since it is larger than the sum of its proper divisors (1).

8421983 is an equidigital number, since it uses as much as digits as its factorization.

8421983 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13824, while the sum is 35.

The square root of 8421983 is about 2902.0652990586. The cubic root of 8421983 is about 203.4564457939.

The spelling of 8421983 in words is "eight million, four hundred twenty-one thousand, nine hundred eighty-three".