9987013 has 2 divisors, whose sum is σ = 9987014. Its totient is φ = 9987012.

The previous prime is 9987001. The next prime is 9987031. The reversal of 9987013 is 3107899.

Together with next prime (9987031) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8196769 + 1790244 = 2863^2 + 1338^2 .

It is an emirp because it is prime and its reverse (3107899) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9987013 - 2¹³ = 9978821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9987113) 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 as a sum of consecutive naturals, namely, 4993506 + 4993507.

It is an arithmetic number, because the mean of its divisors is an integer number (4993507).

Almost surely, 2^9987013 is an apocalyptic number.

It is an amenable number.

9987013 is a deficient number, since it is larger than the sum of its proper divisors (1).

9987013 is an equidigital number, since it uses as much as digits as its factorization.

9987013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13608, while the sum is 37.

The square root of 9987013 is about 3160.2235680407. The cubic root of 9987013 is about 215.3501631217.

The spelling of 9987013 in words is "nine million, nine hundred eighty-seven thousand, thirteen".