9887505 has 16 divisors (see below), whose sum is σ = 16653120. Its totient is φ = 4995648.

The previous prime is 9887503. The next prime is 9887509. The reversal of 9887505 is 5057889.

It is not a de Polignac number, because 9887505 - 2¹ = 9887503 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9887503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17062 + ... + 17631.

It is an arithmetic number, because the mean of its divisors is an integer number (1040820).

Almost surely, 2^9887505 is an apocalyptic number.

9887505 is a gapful number since it is divisible by the number (95) formed by its first and last digit.

It is an amenable number.

9887505 is a deficient number, since it is larger than the sum of its proper divisors (6765615).

9887505 is a wasteful number, since it uses less digits than its factorization.

9887505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34720.

The product of its (nonzero) digits is 100800, while the sum is 42.

The square root of 9887505 is about 3144.4403317602. The cubic root of 9887505 is about 214.6325434211.

The spelling of 9887505 in words is "nine million, eight hundred eighty-seven thousand, five hundred five".