9985659 has 16 divisors (see below), whose sum is σ = 14092800. Its totient is φ = 6271776.

The previous prime is 9985649. The next prime is 9985669. The reversal of 9985659 is 9565899.

It is an interprime number because it is at equal distance from previous prime (9985649) and next prime (9985669).

It is not a de Polignac number, because 9985659 - 2⁸ = 9985403 is a prime.

It is an Ulam number.

9985659 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (9985649) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13257 + ... + 13989.

It is an arithmetic number, because the mean of its divisors is an integer number (880800).

Almost surely, 2^9985659 is an apocalyptic number.

9985659 is a deficient number, since it is larger than the sum of its proper divisors (4107141).

9985659 is a wasteful number, since it uses less digits than its factorization.

9985659 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 994.

The product of its digits is 874800, while the sum is 51.

The square root of 9985659 is about 3160.0093354292. The cubic root of 9985659 is about 215.3404305720.

It can be divided in two parts, 99 and 85659, that added together give a palindrome (85758).

The spelling of 9985659 in words is "nine million, nine hundred eighty-five thousand, six hundred fifty-nine".