891934 has 4 divisors (see below), whose sum is σ = 1337904. Its totient is φ = 445966.

The previous prime is 891929. The next prime is 891967. The reversal of 891934 is 439198.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 439198 = 2 ⋅219599.

It is a self number, because there is not a number n which added to its sum of digits gives 891934.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222982 + ... + 222985.

It is an arithmetic number, because the mean of its divisors is an integer number (334476).

2⁸⁹¹⁹³⁴ is an apocalyptic number.

891934 is a deficient number, since it is larger than the sum of its proper divisors (445970).

891934 is a wasteful number, since it uses less digits than its factorization.

891934 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 445969.

The product of its digits is 7776, while the sum is 34.

The square root of 891934 is about 944.4225749102. The cubic root of 891934 is about 96.2596414697.

The spelling of 891934 in words is "eight hundred ninety-one thousand, nine hundred thirty-four".