9987567 has 16 divisors (see below), whose sum is σ = 13749120. Its totient is φ = 6445152.

The previous prime is 9987553. The next prime is 9987569. The reversal of 9987567 is 7657899.

It is not a de Polignac number, because 9987567 - 2⁶ = 9987503 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9987569) 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, 17653 + ... + 18209.

It is an arithmetic number, because the mean of its divisors is an integer number (859320).

Almost surely, 2^9987567 is an apocalyptic number.

9987567 is a deficient number, since it is larger than the sum of its proper divisors (3761553).

9987567 is a wasteful number, since it uses less digits than its factorization.

9987567 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 742.

The product of its digits is 952560, while the sum is 51.

The square root of 9987567 is about 3160.3112188517. The cubic root of 9987567 is about 215.3541450191.

The spelling of 9987567 in words is "nine million, nine hundred eighty-seven thousand, five hundred sixty-seven".