9987713 has 4 divisors (see below), whose sum is σ = 10151508. Its totient is φ = 9823920.

The previous prime is 9987709. The next prime is 9987737. The reversal of 9987713 is 3177899.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3177899 = 113 ⋅28123.

It can be written as a sum of positive squares in 2 ways, for example, as 4092529 + 5895184 = 2023^2 + 2428^2 .

It is a cyclic number.

It is not a de Polignac number, because 9987713 - 2² = 9987709 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9987793) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81806 + ... + 81927.

It is an arithmetic number, because the mean of its divisors is an integer number (2537877).

Almost surely, 2^9987713 is an apocalyptic number.

It is an amenable number.

9987713 is a deficient number, since it is larger than the sum of its proper divisors (163795).

9987713 is a wasteful number, since it uses less digits than its factorization.

9987713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163794.

The product of its digits is 95256, while the sum is 44.

The square root of 9987713 is about 3160.3343177582. The cubic root of 9987713 is about 215.3551943755.

The spelling of 9987713 in words is "nine million, nine hundred eighty-seven thousand, seven hundred thirteen".