520623 has 6 divisors (see below), whose sum is σ = 752024. Its totient is φ = 347076.

The previous prime is 520621. The next prime is 520631. The reversal of 520623 is 326025.

It is not a de Polignac number, because 520623 - 2¹ = 520621 is a prime.

It is an Ulam number.

It is a Duffinian number.

520623 is a lucky number.

It is a zygodrome in base 3.

It is a junction number, because it is equal to n+sod(n) for n = 520596 and 520605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520621) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 28915 + ... + 28932.

2⁵²⁰⁶²³ is an apocalyptic number.

520623 is a deficient number, since it is larger than the sum of its proper divisors (231401).

520623 is a wasteful number, since it uses less digits than its factorization.

520623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57853 (or 57850 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 520623 is about 721.5420985639. The cubic root of 520623 is about 80.4466166135.

Adding to 520623 its reverse (326025), we get a palindrome (846648).

The spelling of 520623 in words is "five hundred twenty thousand, six hundred twenty-three".