889645 has 4 divisors (see below), whose sum is σ = 1067580. Its totient is φ = 711712.

The previous prime is 889639. The next prime is 889657. The reversal of 889645 is 546988.

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 412164 + 477481 = 642^2 + 691^2 .

It is a cyclic number.

It is not a de Polignac number, because 889645 - 2¹⁷ = 758573 is a prime.

It is a super-3 number, since 3×889645³ = 2112377249826033375, which contains 333 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 889598 and 889607.

It is a congruent number.

It is an unprimeable number.

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, 88960 + ... + 88969.

It is an arithmetic number, because the mean of its divisors is an integer number (266895).

2⁸⁸⁹⁶⁴⁵ is an apocalyptic number.

It is an amenable number.

889645 is a deficient number, since it is larger than the sum of its proper divisors (177935).

889645 is a wasteful number, since it uses less digits than its factorization.

889645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177934.

The product of its digits is 69120, while the sum is 40.

The square root of 889645 is about 943.2099448161. The cubic root of 889645 is about 96.1772261505.

The spelling of 889645 in words is "eight hundred eighty-nine thousand, six hundred forty-five".