825823 has 4 divisors (see below), whose sum is σ = 839880. Its totient is φ = 811768.

The previous prime is 825821. The next prime is 825827. The reversal of 825823 is 328528.

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

It is a cyclic number.

It is not a de Polignac number, because 825823 - 2¹ = 825821 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 825791 and 825800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (825821) 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 in 3 ways as a sum of consecutive naturals, for example, 6940 + ... + 7057.

It is an arithmetic number, because the mean of its divisors is an integer number (209970).

2⁸²⁵⁸²³ is an apocalyptic number.

825823 is a deficient number, since it is larger than the sum of its proper divisors (14057).

825823 is a wasteful number, since it uses less digits than its factorization.

825823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14056.

The product of its digits is 3840, while the sum is 28.

The square root of 825823 is about 908.7480398878. The cubic root of 825823 is about 93.8200495722.

It can be divided in two parts, 8258 and 23, that added together give a square (8281 = 91²).

The spelling of 825823 in words is "eight hundred twenty-five thousand, eight hundred twenty-three".