9959598 has 80 divisors (see below), whose sum is σ = 25508736. Its totient is φ = 2886840.

The previous prime is 9959581. The next prime is 9959611. The reversal of 9959598 is 8959599.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 433015 + ... + 433037.

Almost surely, 2^9959598 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9959598, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12754368).

9959598 is an abundant number, since it is smaller than the sum of its proper divisors (15549138).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9959598 is an equidigital number, since it uses as much as digits as its factorization.

9959598 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63 (or 39 counting only the distinct ones).

The product of its digits is 1312200, while the sum is 54.

The square root of 9959598 is about 3155.8830776821. The cubic root of 9959598 is about 215.1529324748.

Subtracting from 9959598 its reverse (8959599), we obtain a palindrome (999999).

The spelling of 9959598 in words is "nine million, nine hundred fifty-nine thousand, five hundred ninety-eight".