9987539 has 2 divisors, whose sum is σ = 9987540. Its totient is φ = 9987538.

The previous prime is 9987533. The next prime is 9987553. The reversal of 9987539 is 9357899.

9987539 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9987539 - 2⁸ = 9987283 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (9987533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4993769 + 4993770.

It is an arithmetic number, because the mean of its divisors is an integer number (4993770).

Almost surely, 2^9987539 is an apocalyptic number.

9987539 is a deficient number, since it is larger than the sum of its proper divisors (1).

9987539 is an equidigital number, since it uses as much as digits as its factorization.

9987539 is an evil number, because the sum of its binary digits is even.

The product of its digits is 612360, while the sum is 50.

The square root of 9987539 is about 3160.3067889052. The cubic root of 9987539 is about 215.3539437715.

The spelling of 9987539 in words is "nine million, nine hundred eighty-seven thousand, five hundred thirty-nine".