891013 has 4 divisors (see below), whose sum is σ = 894348. Its totient is φ = 887680.

The previous prime is 891001. The next prime is 891017. The reversal of 891013 is 310198.

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

It can be written as a sum of positive squares in 2 ways, for example, as 859329 + 31684 = 927^2 + 178^2 .

It is a cyclic number.

It is not a de Polignac number, because 891013 - 2⁹ = 890501 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a nialpdrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (891017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1228 + ... + 1813.

It is an arithmetic number, because the mean of its divisors is an integer number (223587).

2⁸⁹¹⁰¹³ is an apocalyptic number.

It is an amenable number.

891013 is a deficient number, since it is larger than the sum of its proper divisors (3335).

891013 is a wasteful number, since it uses less digits than its factorization.

891013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3334.

The product of its (nonzero) digits is 216, while the sum is 22.

The square root of 891013 is about 943.9348494467. The cubic root of 891013 is about 96.2264978880.

The spelling of 891013 in words is "eight hundred ninety-one thousand, thirteen".