889981 has 4 divisors (see below), whose sum is σ = 920700. Its totient is φ = 859264.

The previous prime is 889963. The next prime is 889997. The reversal of 889981 is 189988.

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 737881 + 152100 = 859^2 + 390^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-889981 is a prime.

It is a super-2 number, since 2×889981² = 1584132360722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (889901) 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, 15316 + ... + 15373.

It is an arithmetic number, because the mean of its divisors is an integer number (230175).

2⁸⁸⁹⁹⁸¹ is an apocalyptic number.

It is an amenable number.

889981 is a deficient number, since it is larger than the sum of its proper divisors (30719).

889981 is a wasteful number, since it uses less digits than its factorization.

889981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30718.

The product of its digits is 41472, while the sum is 43.

The square root of 889981 is about 943.3880431721. The cubic root of 889981 is about 96.1893326576.

The spelling of 889981 in words is "eight hundred eighty-nine thousand, nine hundred eighty-one".