827823 has 4 divisors (see below), whose sum is σ = 1103768. Its totient is φ = 551880.

The previous prime is 827821. The next prime is 827833. The reversal of 827823 is 328728.

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

It is not a de Polignac number, because 827823 - 2¹ = 827821 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (827821) 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, 137968 + ... + 137973.

It is an arithmetic number, because the mean of its divisors is an integer number (275942).

2⁸²⁷⁸²³ is an apocalyptic number.

827823 is a deficient number, since it is larger than the sum of its proper divisors (275945).

827823 is a wasteful number, since it uses less digits than its factorization.

827823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275944.

The product of its digits is 5376, while the sum is 30.

The square root of 827823 is about 909.8477894681. The cubic root of 827823 is about 93.8957271388.

The spelling of 827823 in words is "eight hundred twenty-seven thousand, eight hundred twenty-three".