889681 has 4 divisors (see below), whose sum is σ = 958132. Its totient is φ = 821232.

The previous prime is 889673. The next prime is 889687. The reversal of 889681 is 186988.

It is a happy number.

889681 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 313600 + 576081 = 560^2 + 759^2 .

It is a cyclic number.

It is not a de Polignac number, because 889681 - 2³ = 889673 is a prime.

It is a super-2 number, since 2×889681² = 1583064563522, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (889687) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34206 + ... + 34231.

It is an arithmetic number, because the mean of its divisors is an integer number (239533).

2⁸⁸⁹⁶⁸¹ is an apocalyptic number.

It is an amenable number.

889681 is a deficient number, since it is larger than the sum of its proper divisors (68451).

889681 is a wasteful number, since it uses less digits than its factorization.

889681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68450.

The product of its digits is 27648, while the sum is 40.

The square root of 889681 is about 943.2290283913. The cubic root of 889681 is about 96.1785234221.

The spelling of 889681 in words is "eight hundred eighty-nine thousand, six hundred eighty-one".