9984859 has 2 divisors, whose sum is σ = 9984860. Its totient is φ = 9984858.

The previous prime is 9984851. The next prime is 9984869. The reversal of 9984859 is 9584899.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9984859 - 2³ = 9984851 is a prime.

9984859 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (9984851) 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, 4992429 + 4992430.

It is an arithmetic number, because the mean of its divisors is an integer number (4992430).

Almost surely, 2^9984859 is an apocalyptic number.

9984859 is a deficient number, since it is larger than the sum of its proper divisors (1).

9984859 is an equidigital number, since it uses as much as digits as its factorization.

9984859 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 933120, while the sum is 52.

The square root of 9984859 is about 3159.8827509893. The cubic root of 9984859 is about 215.3346797600.

The spelling of 9984859 in words is "nine million, nine hundred eighty-four thousand, eight hundred fifty-nine".