520923 has 24 divisors (see below), whose sum is σ = 810768. Its totient is φ = 295488.

The previous prime is 520921. The next prime is 520943. The reversal of 520923 is 329025.

It is not a de Polignac number, because 520923 - 2¹ = 520921 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 520923.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520921) 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, 14061 + ... + 14097.

It is an arithmetic number, because the mean of its divisors is an integer number (33782).

2⁵²⁰⁹²³ is an apocalyptic number.

520923 is a deficient number, since it is larger than the sum of its proper divisors (289845).

520923 is a wasteful number, since it uses less digits than its factorization.

520923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91 (or 72 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 21.

The square root of 520923 is about 721.7499567025. The cubic root of 520923 is about 80.4620656370.

Adding to 520923 its reverse (329025), we get a palindrome (849948).

The spelling of 520923 in words is "five hundred twenty thousand, nine hundred twenty-three".