520799 has 4 divisors (see below), whose sum is σ = 524400. Its totient is φ = 517200.

The previous prime is 520787. The next prime is 520813. The reversal of 520799 is 997025.

Added to its reverse (997025) it gives a square (1517824 = 1232²).

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 520799 - 2¹⁶ = 455263 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520759) 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, 1574 + ... + 1875.

It is an arithmetic number, because the mean of its divisors is an integer number (131100).

2⁵²⁰⁷⁹⁹ is an apocalyptic number.

520799 is a deficient number, since it is larger than the sum of its proper divisors (3601).

520799 is a wasteful number, since it uses less digits than its factorization.

520799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3600.

The product of its (nonzero) digits is 5670, while the sum is 32.

The square root of 520799 is about 721.6640492639. The cubic root of 520799 is about 80.4556807599.

Adding to 520799 its reverse (997025), we get a square (1517824 = 1232²).

The spelling of 520799 in words is "five hundred twenty thousand, seven hundred ninety-nine".