9985559 has 2 divisors, whose sum is σ = 9985560. Its totient is φ = 9985558.

The previous prime is 9985553. The next prime is 9985601. The reversal of 9985559 is 9555899.

9985559 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9985559 - 2⁸ = 9985303 is a prime.

It is a super-2 number, since 2×9985559² = 199422777084962, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9985553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4992779 + 4992780.

It is an arithmetic number, because the mean of its divisors is an integer number (4992780).

Almost surely, 2^9985559 is an apocalyptic number.

9985559 is a deficient number, since it is larger than the sum of its proper divisors (1).

9985559 is an equidigital number, since it uses as much as digits as its factorization.

9985559 is an evil number, because the sum of its binary digits is even.

The product of its digits is 729000, while the sum is 50.

The square root of 9985559 is about 3159.9935126516. The cubic root of 9985559 is about 215.3397117373.

It can be divided in two parts, 99 and 85559, that added together give a palindrome (85658).

The spelling of 9985559 in words is "nine million, nine hundred eighty-five thousand, five hundred fifty-nine".