9987275 has 6 divisors (see below), whose sum is σ = 12384252. Its totient is φ = 7989800.

The previous prime is 9987253. The next prime is 9987283. The reversal of 9987275 is 5727899.

It is not a de Polignac number, because 9987275 - 2¹² = 9983179 is a prime.

It is a d-powerful number, because it can be written as 9² + 9⁴ + 8⁴ + 7⁵ + 2²² + 7⁸ + 5⁴ .

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 199721 + ... + 199770.

It is an arithmetic number, because the mean of its divisors is an integer number (2064042).

Almost surely, 2^9987275 is an apocalyptic number.

9987275 is a deficient number, since it is larger than the sum of its proper divisors (2396977).

9987275 is a wasteful number, since it uses less digits than its factorization.

9987275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 399501 (or 399496 counting only the distinct ones).

The product of its digits is 317520, while the sum is 47.

The square root of 9987275 is about 3160.2650205323. The cubic root of 9987275 is about 215.3520462756.

The spelling of 9987275 in words is "nine million, nine hundred eighty-seven thousand, two hundred seventy-five".