825791 has 2 divisors, whose sum is σ = 825792. Its totient is φ = 825790.

The previous prime is 825779. The next prime is 825821. The reversal of 825791 is 197528.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 825791 - 2¹⁴ = 809407 is a prime.

It is a Chen prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 825791.

It is not a weakly prime, because it can be changed into another prime (825701) 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, 412895 + 412896.

It is an arithmetic number, because the mean of its divisors is an integer number (412896).

2⁸²⁵⁷⁹¹ is an apocalyptic number.

825791 is a deficient number, since it is larger than the sum of its proper divisors (1).

825791 is an equidigital number, since it uses as much as digits as its factorization.

825791 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5040, while the sum is 32.

The square root of 825791 is about 908.7304330768. The cubic root of 825791 is about 93.8188377385.

The spelling of 825791 in words is "eight hundred twenty-five thousand, seven hundred ninety-one".