891089 has 16 divisors (see below), whose sum is σ = 1026432. Its totient is φ = 768768.

The previous prime is 891067. The next prime is 891091. The reversal of 891089 is 980198.

It is a happy number.

891089 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 891089 - 2⁸ = 890833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (891049) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16787 + ... + 16839.

It is an arithmetic number, because the mean of its divisors is an integer number (64152).

2⁸⁹¹⁰⁸⁹ is an apocalyptic number.

It is an amenable number.

891089 is a deficient number, since it is larger than the sum of its proper divisors (135343).

891089 is a wasteful number, since it uses less digits than its factorization.

891089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136.

The product of its (nonzero) digits is 5184, while the sum is 35.

The square root of 891089 is about 943.9751056040. The cubic root of 891089 is about 96.2292337276.

The spelling of 891089 in words is "eight hundred ninety-one thousand, eighty-nine".