9887689 has 4 divisors (see below), whose sum is σ = 11300224. Its totient is φ = 8475156.

The previous prime is 9887687. The next prime is 9887699. The reversal of 9887689 is 9867889.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9867889 = 31 ⋅318319.

It is a cyclic number.

It is not a de Polignac number, because 9887689 - 2¹ = 9887687 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (9887681) 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, 706257 + ... + 706270.

It is an arithmetic number, because the mean of its divisors is an integer number (2825056).

Almost surely, 2^9887689 is an apocalyptic number.

It is an amenable number.

9887689 is a deficient number, since it is larger than the sum of its proper divisors (1412535).

9887689 is a wasteful number, since it uses less digits than its factorization.

9887689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1412534.

The product of its digits is 1741824, while the sum is 55.

The square root of 9887689 is about 3144.4695896128. The cubic root of 9887689 is about 214.6338748032.

The spelling of 9887689 in words is "nine million, eight hundred eighty-seven thousand, six hundred eighty-nine".