891673 has 4 divisors (see below), whose sum is σ = 903040. Its totient is φ = 880308.

The previous prime is 891661. The next prime is 891677. The reversal of 891673 is 376198.

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.

It is a cyclic number.

It is not a de Polignac number, because 891673 - 2⁹ = 891161 is a prime.

It is a Duffinian number.

891673 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (891677) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 5565 + ... + 5722.

It is an arithmetic number, because the mean of its divisors is an integer number (225760).

2⁸⁹¹⁶⁷³ is an apocalyptic number.

It is an amenable number.

891673 is a deficient number, since it is larger than the sum of its proper divisors (11367).

891673 is a wasteful number, since it uses less digits than its factorization.

891673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11366.

The product of its digits is 9072, while the sum is 34.

The square root of 891673 is about 944.2843851298. The cubic root of 891673 is about 96.2502513065.

The spelling of 891673 in words is "eight hundred ninety-one thousand, six hundred seventy-three".