9987005 has 8 divisors (see below), whose sum is σ = 13696512. Its totient is φ = 6848208.

The previous prime is 9987001. The next prime is 9987013. The reversal of 9987005 is 5007899.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 9987005 - 2² = 9987001 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 9987005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9987001) 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 7 ways as a sum of consecutive naturals, for example, 142637 + ... + 142706.

It is an arithmetic number, because the mean of its divisors is an integer number (1712064).

Almost surely, 2^9987005 is an apocalyptic number.

It is an amenable number.

9987005 is a deficient number, since it is larger than the sum of its proper divisors (3709507).

9987005 is a wasteful number, since it uses less digits than its factorization.

9987005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285355.

The product of its (nonzero) digits is 22680, while the sum is 38.

The square root of 9987005 is about 3160.2223023072. Note that the first 3 decimals coincide. The cubic root of 9987005 is about 215.3501056203.

The spelling of 9987005 in words is "nine million, nine hundred eighty-seven thousand, five".