891073 has 4 divisors (see below), whose sum is σ = 910080. Its totient is φ = 872068.

The previous prime is 891067. The next prime is 891091. The reversal of 891073 is 370198.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 370198 = 2 ⋅185099.

It is a cyclic number.

It is not a de Polignac number, because 891073 - 2¹³ = 882881 is a prime.

It is a super-2 number, since 2×891073² = 1588022182658, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (891173) 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, 9433 + ... + 9526.

It is an arithmetic number, because the mean of its divisors is an integer number (227520).

2⁸⁹¹⁰⁷³ is an apocalyptic number.

It is an amenable number.

891073 is a deficient number, since it is larger than the sum of its proper divisors (19007).

891073 is a wasteful number, since it uses less digits than its factorization.

891073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19006.

The product of its (nonzero) digits is 1512, while the sum is 28.

The square root of 891073 is about 943.9666307662. The cubic root of 891073 is about 96.2286577743.

The spelling of 891073 in words is "eight hundred ninety-one thousand, seventy-three".