9856559 has 2 divisors, whose sum is σ = 9856560. Its totient is φ = 9856558.

The previous prime is 9856537. The next prime is 9856577. The reversal of 9856559 is 9556589.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9856559 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9856529) 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, 4928279 + 4928280.

It is an arithmetic number, because the mean of its divisors is an integer number (4928280).

Almost surely, 2^9856559 is an apocalyptic number.

9856559 is a deficient number, since it is larger than the sum of its proper divisors (1).

9856559 is an equidigital number, since it uses as much as digits as its factorization.

9856559 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 486000, while the sum is 47.

The square root of 9856559 is about 3139.5157269872. The cubic root of 9856559 is about 214.4083897989.

The spelling of 9856559 in words is "nine million, eight hundred fifty-six thousand, five hundred fifty-nine".