823239 has 24 divisors (see below), whose sum is σ = 1284192. Its totient is φ = 506880.

The previous prime is 823237. The next prime is 823241. The reversal of 823239 is 932328.

It is an interprime number because it is at equal distance from previous prime (823237) and next prime (823241).

It is not a de Polignac number, because 823239 - 2¹ = 823237 is a prime.

It is a super-2 number, since 2×823239² = 1355444902242, which contains 22 as substring.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (823231) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8439 + ... + 8535.

It is an arithmetic number, because the mean of its divisors is an integer number (53508).

2⁸²³²³⁹ is an apocalyptic number.

823239 is a deficient number, since it is larger than the sum of its proper divisors (460953).

823239 is a wasteful number, since it uses less digits than its factorization.

823239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167 (or 164 counting only the distinct ones).

The product of its digits is 2592, while the sum is 27.

The square root of 823239 is about 907.3251897749. The cubic root of 823239 is about 93.7220930270.

It can be divided in two parts, 82 and 3239, that added together give a triangular number (3321 = T₈₁).

The spelling of 823239 in words is "eight hundred twenty-three thousand, two hundred thirty-nine".