9899934 has 32 divisors (see below), whose sum is σ = 21962880. Its totient is φ = 2949600.

The previous prime is 9899921. The next prime is 9899947. The reversal of 9899934 is 4399989.

It is an interprime number because it is at equal distance from previous prime (9899921) and next prime (9899947).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2797 + ... + 5255.

It is an arithmetic number, because the mean of its divisors is an integer number (686340).

Almost surely, 2^9899934 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9899934, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10981440).

9899934 is an abundant number, since it is smaller than the sum of its proper divisors (12062946).

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

9899934 is a wasteful number, since it uses less digits than its factorization.

9899934 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2536.

The product of its digits is 629856, while the sum is 51.

The square root of 9899934 is about 3146.4160564045. The cubic root of 9899934 is about 214.7224397388.

Subtracting from 9899934 its reverse (4399989), we obtain a palindrome (5499945).

The spelling of 9899934 in words is "nine million, eight hundred ninety-nine thousand, nine hundred thirty-four".