891134 has 4 divisors (see below), whose sum is σ = 1336704. Its totient is φ = 445566.

The previous prime is 891133. The next prime is 891151. The reversal of 891134 is 431198.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (891133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222782 + ... + 222785.

It is an arithmetic number, because the mean of its divisors is an integer number (334176).

2⁸⁹¹¹³⁴ is an apocalyptic number.

891134 is a deficient number, since it is larger than the sum of its proper divisors (445570).

891134 is a wasteful number, since it uses less digits than its factorization.

891134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 445569.

The product of its digits is 864, while the sum is 26.

The square root of 891134 is about 943.9989406774. The cubic root of 891134 is about 96.2308535593.

The spelling of 891134 in words is "eight hundred ninety-one thousand, one hundred thirty-four".