889591 has 4 divisors (see below), whose sum is σ = 913672. Its totient is φ = 865512.

The previous prime is 889589. The next prime is 889597. The reversal of 889591 is 195988.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 889591 - 2¹ = 889589 is a prime.

It is a Duffinian number.

889591 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (889597) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11985 + ... + 12058.

It is an arithmetic number, because the mean of its divisors is an integer number (228418).

2⁸⁸⁹⁵⁹¹ is an apocalyptic number.

889591 is a deficient number, since it is larger than the sum of its proper divisors (24081).

889591 is a wasteful number, since it uses less digits than its factorization.

889591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24080.

The product of its digits is 25920, while the sum is 40.

The square root of 889591 is about 943.1813187293. The cubic root of 889591 is about 96.1752801776.

The spelling of 889591 in words is "eight hundred eighty-nine thousand, five hundred ninety-one".