8420084539 has 2 divisors, whose sum is σ = 8420084540. Its totient is φ = 8420084538.

The previous prime is 8420084537. The next prime is 8420084549. The reversal of 8420084539 is 9354800248.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8420084539 - 2¹ = 8420084537 is a prime.

Together with 8420084537, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 8420084495 and 8420084504.

It is not a weakly prime, because it can be changed into another prime (8420084531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4210042269 + 4210042270.

It is an arithmetic number, because the mean of its divisors is an integer number (4210042270).

Almost surely, 2^8420084539 is an apocalyptic number.

8420084539 is a deficient number, since it is larger than the sum of its proper divisors (1).

8420084539 is an equidigital number, since it uses as much as digits as its factorization.

8420084539 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 276480, while the sum is 43.

The square root of 8420084539 is about 91761.0186244682. The cubic root of 8420084539 is about 2034.4115710815.

The spelling of 8420084539 in words is "eight billion, four hundred twenty million, eighty-four thousand, five hundred thirty-nine".