9988735 has 4 divisors (see below), whose sum is σ = 11986488. Its totient is φ = 7990984.

The previous prime is 9988733. The next prime is 9988747. The reversal of 9988735 is 5378899.

9988735 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 9988735 - 2¹ = 9988733 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

9988735 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9988733) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 998869 + ... + 998878.

It is an arithmetic number, because the mean of its divisors is an integer number (2996622).

Almost surely, 2^9988735 is an apocalyptic number.

9988735 is a deficient number, since it is larger than the sum of its proper divisors (1997753).

9988735 is a wasteful number, since it uses less digits than its factorization.

9988735 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1997752.

The product of its digits is 544320, while the sum is 49.

The square root of 9988735 is about 3160.4960053764. The cubic root of 9988735 is about 215.3625395840.

The spelling of 9988735 in words is "nine million, nine hundred eighty-eight thousand, seven hundred thirty-five".