823539 has 8 divisors (see below), whose sum is σ = 1103872. Its totient is φ = 546120.

The previous prime is 823519. The next prime is 823541. The reversal of 823539 is 935328.

It is a happy number.

823539 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 823539 - 2⁸ = 823283 is a prime.

It is an Ulam number.

It is a Duffinian number.

823539 is a lucky number.

It is a nialpdrome in base 7.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (823519) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54 + ... + 1284.

It is an arithmetic number, because the mean of its divisors is an integer number (137984).

2⁸²³⁵³⁹ is an apocalyptic number.

823539 is a deficient number, since it is larger than the sum of its proper divisors (280333).

823539 is a wasteful number, since it uses less digits than its factorization.

823539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1457.

The product of its digits is 6480, while the sum is 30.

The square root of 823539 is about 907.4904958180. The cubic root of 823539 is about 93.7334761989.

The spelling of 823539 in words is "eight hundred twenty-three thousand, five hundred thirty-nine".