891055 has 16 divisors (see below), whose sum is σ = 1236384. Its totient is φ = 609280.

The previous prime is 891049. The next prime is 891061. The reversal of 891055 is 550198.

It is an interprime number because it is at equal distance from previous prime (891049) and next prime (891061).

It is not a de Polignac number, because 891055 - 2³ = 891047 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 459 + ... + 1411.

It is an arithmetic number, because the mean of its divisors is an integer number (77274).

2⁸⁹¹⁰⁵⁵ is an apocalyptic number.

891055 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

891055 is a deficient number, since it is larger than the sum of its proper divisors (345329).

891055 is a wasteful number, since it uses less digits than its factorization.

891055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 986.

The product of its (nonzero) digits is 1800, while the sum is 28.

The square root of 891055 is about 943.9570964827. The cubic root of 891055 is about 96.2280098186.

The spelling of 891055 in words is "eight hundred ninety-one thousand, fifty-five".