9873565 has 8 divisors (see below), whose sum is σ = 12759768. Its totient is φ = 7291200.

The previous prime is 9873557. The next prime is 9873569. The reversal of 9873565 is 5653789.

9873565 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 306916 + 9566649 = 554^2 + 3093^2 .

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

It is not a de Polignac number, because 9873565 - 2³ = 9873557 is a prime.

It is a Duffinian number.

9873565 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9873569) 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, 75886 + ... + 76015.

It is an arithmetic number, because the mean of its divisors is an integer number (1594971).

Almost surely, 2^9873565 is an apocalyptic number.

It is an amenable number.

9873565 is a deficient number, since it is larger than the sum of its proper divisors (2886203).

9873565 is a wasteful number, since it uses less digits than its factorization.

9873565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151919.

The product of its digits is 226800, while the sum is 43.

The square root of 9873565 is about 3142.2229392581. Note that the first 3 decimals coincide. The cubic root of 9873565 is about 214.5316286858.

The spelling of 9873565 in words is "nine million, eight hundred seventy-three thousand, five hundred sixty-five".