889781 has 4 divisors (see below), whose sum is σ = 899052. Its totient is φ = 880512.

The previous prime is 889769. The next prime is 889783. The reversal of 889781 is 187988.

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 167281 + 722500 = 409^2 + 850^2 .

It is a cyclic number.

It is not a de Polignac number, because 889781 - 2¹⁸ = 627637 is a prime.

It is a super-2 number, since 2×889781² = 1583420455922, 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 (889783) 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, 4490 + ... + 4683.

It is an arithmetic number, because the mean of its divisors is an integer number (224763).

2⁸⁸⁹⁷⁸¹ is an apocalyptic number.

It is an amenable number.

889781 is a deficient number, since it is larger than the sum of its proper divisors (9271).

889781 is an equidigital number, since it uses as much as digits as its factorization.

889781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9270.

The product of its digits is 32256, while the sum is 41.

The square root of 889781 is about 943.2820362967. The cubic root of 889781 is about 96.1821267706.

The spelling of 889781 in words is "eight hundred eighty-nine thousand, seven hundred eighty-one".