891371 has 4 divisors (see below), whose sum is σ = 959952. Its totient is φ = 822792.

The previous prime is 891349. The next prime is 891377. The reversal of 891371 is 173198.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 173198 = 2 ⋅86599.

It is a cyclic number.

It is not a de Polignac number, because 891371 - 2¹⁴ = 874987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (891377) 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 in 3 ways as a sum of consecutive naturals, for example, 34271 + ... + 34296.

It is an arithmetic number, because the mean of its divisors is an integer number (239988).

2⁸⁹¹³⁷¹ is an apocalyptic number.

891371 is a deficient number, since it is larger than the sum of its proper divisors (68581).

891371 is a wasteful number, since it uses less digits than its factorization.

891371 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68580.

The product of its digits is 1512, while the sum is 29.

The square root of 891371 is about 944.1244621341. The cubic root of 891371 is about 96.2393837731.

The spelling of 891371 in words is "eight hundred ninety-one thousand, three hundred seventy-one".