887665 has 4 divisors (see below), whose sum is σ = 1065204. Its totient is φ = 710128.

The previous prime is 887659. The next prime is 887669. The reversal of 887665 is 566788.

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 613089 + 274576 = 783^2 + 524^2 .

It is a cyclic number.

It is not a de Polignac number, because 887665 - 2³ = 887657 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (887669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 88762 + ... + 88771.

It is an arithmetic number, because the mean of its divisors is an integer number (266301).

2⁸⁸⁷⁶⁶⁵ is an apocalyptic number.

It is an amenable number.

887665 is a deficient number, since it is larger than the sum of its proper divisors (177539).

887665 is a wasteful number, since it uses less digits than its factorization.

887665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177538.

The product of its digits is 80640, while the sum is 40.

The square root of 887665 is about 942.1597529082. The cubic root of 887665 is about 96.1058222544.

The spelling of 887665 in words is "eight hundred eighty-seven thousand, six hundred sixty-five".