520779505 has 8 divisors (see below), whose sum is σ = 638232192. Its totient is φ = 407759088.

The previous prime is 520779503. The next prime is 520779529. The reversal of 520779505 is 505977025.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 520779505 - 2¹ = 520779503 is a prime.

It is a super-2 number, since 2×520779505² = 542422585656090050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (520779503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1107807 + ... + 1108276.

It is an arithmetic number, because the mean of its divisors is an integer number (79779024).

Almost surely, 2^520779505 is an apocalyptic number.

It is an amenable number.

520779505 is a deficient number, since it is larger than the sum of its proper divisors (117452687).

520779505 is a wasteful number, since it uses less digits than its factorization.

520779505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2216135.

The product of its (nonzero) digits is 110250, while the sum is 40.

The square root of 520779505 is about 22820.5938792136. The cubic root of 520779505 is about 804.5467685181.

It can be divided in two parts, 520779 and 505, that added together give a square (521284 = 722²).

The spelling of 520779505 in words is "five hundred twenty million, seven hundred seventy-nine thousand, five hundred five".