Search a number
889 = 7127

889 has 4 divisors (see below), whose sum is σ = 1024. Its totient is φ = 756.

The previous prime is 887. The next prime is 907. The reversal of 889 is 988.

889 is nontrivially palindromic in base 13.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 889 - 21 = 887 is a prime.

It is a magnanimous number.

It is a Duffinian number.

889 is an undulating number in base 13.

It is a plaindrome in base 10, base 14 and base 16.

It is a nialpdrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57 + ... + 70.

It is an arithmetic number, because the mean of its divisors is an integer number (256).

It is an amenable number.

889 is a deficient number, since it is larger than the sum of its proper divisors (135).

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

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

The sum of its prime factors is 134.

The product of its digits is 576, while the sum is 25.

The square root of 889 is about 29.8161030318. The cubic root of 889 is about 9.6153977436.

Subtracting from 889 its product of digits (576), we obtain a palindrome (313).

Subtracting 889 from its reverse (988), we obtain a palindrome (99).

The spelling of 889 in words is "eight hundred eighty-nine", and thus it is an aban number and an oban number.

Divisors: 1 7 127 889