9987173 has 8 divisors (see below), whose sum is σ = 11485248. Its totient is φ = 8506944.

The previous prime is 9987157. The next prime is 9987181. The reversal of 9987173 is 3717899.

9987173 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 9987173 - 2⁴ = 9987157 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 (9987113) 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, 3236 + ... + 5517.

It is an arithmetic number, because the mean of its divisors is an integer number (1435656).

Almost surely, 2^9987173 is an apocalyptic number.

It is an amenable number.

9987173 is a deficient number, since it is larger than the sum of its proper divisors (1498075).

9987173 is a wasteful number, since it uses less digits than its factorization.

9987173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8923.

The product of its digits is 95256, while the sum is 44.

The square root of 9987173 is about 3160.2488826040. The cubic root of 9987173 is about 215.3513131433.

The spelling of 9987173 in words is "nine million, nine hundred eighty-seven thousand, one hundred seventy-three".