520803929 has 4 divisors (see below), whose sum is σ = 521767140. Its totient is φ = 519840720.

The previous prime is 520803911. The next prime is 520803967. The reversal of 520803929 is 929308025.

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 211993600 + 308810329 = 14560^2 + 17573^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-520803929 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 520803892 and 520803901.

It is not an unprimeable number, because it can be changed into a prime (520803979) 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, 480794 + ... + 481875.

It is an arithmetic number, because the mean of its divisors is an integer number (130441785).

Almost surely, 2^520803929 is an apocalyptic number.

It is an amenable number.

520803929 is a deficient number, since it is larger than the sum of its proper divisors (963211).

520803929 is an equidigital number, since it uses as much as digits as its factorization.

520803929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 963210.

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 520803929 is about 22821.1290036229. The cubic root of 520803929 is about 804.5593457815.

The spelling of 520803929 in words is "five hundred twenty million, eight hundred three thousand, nine hundred twenty-nine".