889891 has 2 divisors, whose sum is σ = 889892. Its totient is φ = 889890.

The previous prime is 889879. The next prime is 889901. The reversal of 889891 is 198988.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 889891 - 2¹⁷ = 758819 is a prime.

889891 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (889871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 444945 + 444946.

It is an arithmetic number, because the mean of its divisors is an integer number (444946).

2⁸⁸⁹⁸⁹¹ is an apocalyptic number.

889891 is a deficient number, since it is larger than the sum of its proper divisors (1).

889891 is an equidigital number, since it uses as much as digits as its factorization.

889891 is an odious number, because the sum of its binary digits is odd.

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

The square root of 889891 is about 943.3403415523. The cubic root of 889891 is about 96.1860901421.

The spelling of 889891 in words is "eight hundred eighty-nine thousand, eight hundred ninety-one".