9887489 has 4 divisors (see below), whose sum is σ = 10469124. Its totient is φ = 9305856.

The previous prime is 9887441. The next prime is 9887503. The reversal of 9887489 is 9847889.

9887489 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7246864 + 2640625 = 2692^2 + 1625^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9887489 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 9887489.

It is not an unprimeable number, because it can be changed into a prime (9880489) 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, 290792 + ... + 290825.

It is an arithmetic number, because the mean of its divisors is an integer number (2617281).

Almost surely, 2^9887489 is an apocalyptic number.

It is an amenable number.

9887489 is a deficient number, since it is larger than the sum of its proper divisors (581635).

9887489 is a wasteful number, since it uses less digits than its factorization.

9887489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 581634.

The product of its digits is 1161216, while the sum is 53.

The square root of 9887489 is about 3144.4377875862. The cubic root of 9887489 is about 214.6324276479.

The spelling of 9887489 in words is "nine million, eight hundred eighty-seven thousand, four hundred eighty-nine".