520829 has 4 divisors (see below), whose sum is σ = 551484. Its totient is φ = 490176.

The previous prime is 520813. The next prime is 520837. The reversal of 520829 is 928025.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 458329 + 62500 = 677^2 + 250^2 .

It is a cyclic number.

It is not a de Polignac number, because 520829 - 2⁴ = 520813 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 520798 and 520807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520889) 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, 15302 + ... + 15335.

It is an arithmetic number, because the mean of its divisors is an integer number (137871).

2⁵²⁰⁸²⁹ is an apocalyptic number.

It is an amenable number.

520829 is a deficient number, since it is larger than the sum of its proper divisors (30655).

520829 is a wasteful number, since it uses less digits than its factorization.

520829 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30654.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 520829 is about 721.6848342594. The cubic root of 520829 is about 80.4572255812.

The spelling of 520829 in words is "five hundred twenty thousand, eight hundred twenty-nine".