891133 has 2 divisors, whose sum is σ = 891134. Its totient is φ = 891132.

The previous prime is 891103. The next prime is 891151. The reversal of 891133 is 331198.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 851929 + 39204 = 923^2 + 198^2 .

It is a cyclic number.

It is not a de Polignac number, because 891133 - 2⁵ = 891101 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 891098 and 891107.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (891103) 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 as a sum of consecutive naturals, namely, 445566 + 445567.

It is an arithmetic number, because the mean of its divisors is an integer number (445567).

2⁸⁹¹¹³³ is an apocalyptic number.

It is an amenable number.

891133 is a deficient number, since it is larger than the sum of its proper divisors (1).

891133 is an equidigital number, since it uses as much as digits as its factorization.

891133 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 648, while the sum is 25.

The square root of 891133 is about 943.9984110156. The cubic root of 891133 is about 96.2308175636.

It can be divided in two parts, 891 and 133, that added together give a 10-th power (1024 = 2¹⁰).

The spelling of 891133 in words is "eight hundred ninety-one thousand, one hundred thirty-three".