9987506 has 8 divisors (see below), whose sum is σ = 15057900. Its totient is φ = 4968208.

The previous prime is 9987503. The next prime is 9987511. The reversal of 9987506 is 6057899.

It can be written as a sum of positive squares in 2 ways, for example, as 9333025 + 654481 = 3055^2 + 809^2 .

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

It is a super-2 number, since 2×9987506² = 199500552200072, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (9987503) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 12281 + ... + 13068.

Almost surely, 2^9987506 is an apocalyptic number.

9987506 is a deficient number, since it is larger than the sum of its proper divisors (5070394).

9987506 is a wasteful number, since it uses less digits than its factorization.

9987506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25548.

The product of its (nonzero) digits is 136080, while the sum is 44.

The square root of 9987506 is about 3160.3015678887. The cubic root of 9987506 is about 215.3537065864.

The spelling of 9987506 in words is "nine million, nine hundred eighty-seven thousand, five hundred six".