9988647 has 8 divisors (see below), whose sum is σ = 13897344. Its totient is φ = 6369528.

The previous prime is 9988633. The next prime is 9988687. The reversal of 9988647 is 7468899.

It is a happy number.

9988647 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 9988647 - 2⁷ = 9988519 is a prime.

It is a d-powerful number, because it can be written as 9⁴ + 9⁴ + 8⁷ + 8⁷ + 6² + 4⁷ + 7⁸ .

It is a self number, because there is not a number n which added to its sum of digits gives 9988647.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9988607) 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 7 ways as a sum of consecutive naturals, for example, 72313 + ... + 72450.

It is an arithmetic number, because the mean of its divisors is an integer number (1737168).

Almost surely, 2^9988647 is an apocalyptic number.

9988647 is a deficient number, since it is larger than the sum of its proper divisors (3908697).

9988647 is a wasteful number, since it uses less digits than its factorization.

9988647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144789.

The product of its digits is 870912, while the sum is 51.

The square root of 9988647 is about 3160.4820834803. The cubic root of 9988647 is about 215.3619071395.

The spelling of 9988647 in words is "nine million, nine hundred eighty-eight thousand, six hundred forty-seven".