523239 has 4 divisors (see below), whose sum is σ = 697656. Its totient is φ = 348824.

The previous prime is 523219. The next prime is 523261. The reversal of 523239 is 932325.

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 523239 - 2⁵ = 523207 is a prime.

It is a super-2 number, since 2×523239² = 547558102242, which contains 22 as substring.

It is a D-number.

523239 is a lucky number.

It is a nialpdrome in base 9.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (523219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87204 + ... + 87209.

It is an arithmetic number, because the mean of its divisors is an integer number (174414).

2⁵²³²³⁹ is an apocalyptic number.

523239 is a deficient number, since it is larger than the sum of its proper divisors (174417).

523239 is a wasteful number, since it uses less digits than its factorization.

523239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174416.

The product of its digits is 1620, while the sum is 24.

The square root of 523239 is about 723.3526111102. The cubic root of 523239 is about 80.5811329182.

The spelling of 523239 in words is "five hundred twenty-three thousand, two hundred thirty-nine".