9889887 has 8 divisors (see below), whose sum is σ = 15070336. Its totient is φ = 5651352.

The previous prime is 9889877. The next prime is 9889889. The reversal of 9889887 is 7889889.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 9889887 - 2¹⁰ = 9888863 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9889889) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 235453 + ... + 235494.

It is an arithmetic number, because the mean of its divisors is an integer number (1883792).

Almost surely, 2^9889887 is an apocalyptic number.

9889887 is a deficient number, since it is larger than the sum of its proper divisors (5180449).

9889887 is a wasteful number, since it uses less digits than its factorization.

9889887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 470957.

The product of its digits is 2322432, while the sum is 57.

The square root of 9889887 is about 3144.8190726972. The cubic root of 9889887 is about 214.6497777543.

The spelling of 9889887 in words is "nine million, eight hundred eighty-nine thousand, eight hundred eighty-seven".