9987534 has 48 divisors (see below), whose sum is σ = 23182848. Its totient is φ = 3096576.

The previous prime is 9987533. The next prime is 9987539. The reversal of 9987534 is 4357899.

9987534 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 9987534.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9987533) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 38734 + ... + 38990.

It is an arithmetic number, because the mean of its divisors is an integer number (482976).

Almost surely, 2^9987534 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9987534, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11591424).

9987534 is an abundant number, since it is smaller than the sum of its proper divisors (13195314).

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

9987534 is a wasteful number, since it uses less digits than its factorization.

9987534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 409 (or 406 counting only the distinct ones).

The product of its digits is 272160, while the sum is 45.

The square root of 9987534 is about 3160.3059978426. The cubic root of 9987534 is about 215.3539078344.

The spelling of 9987534 in words is "nine million, nine hundred eighty-seven thousand, five hundred thirty-four".