869823 has 12 divisors (see below), whose sum is σ = 1267968. Its totient is φ = 574560.

The previous prime is 869819. The next prime is 869849. The reversal of 869823 is 328968.

It is not a de Polignac number, because 869823 - 2² = 869819 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (869863) 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 11 ways as a sum of consecutive naturals, for example, 763 + ... + 1523.

It is an arithmetic number, because the mean of its divisors is an integer number (105664).

2⁸⁶⁹⁸²³ is an apocalyptic number.

869823 is a deficient number, since it is larger than the sum of its proper divisors (398145).

869823 is a wasteful number, since it uses less digits than its factorization.

869823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 894 (or 891 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 869823 is about 932.6430185232. The cubic root of 869823 is about 95.4575526573.

The spelling of 869823 in words is "eight hundred sixty-nine thousand, eight hundred twenty-three".