520768947 has 8 divisors (see below), whose sum is σ = 697240720. Its totient is φ = 345738240.

The previous prime is 520768943. The next prime is 520768981. The reversal of 520768947 is 749867025.

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

It is not a de Polignac number, because 520768947 - 2² = 520768943 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 520768896 and 520768905.

It is not an unprimeable number, because it can be changed into a prime (520768943) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 359422 + ... + 360867.

It is an arithmetic number, because the mean of its divisors is an integer number (87155090).

Almost surely, 2^520768947 is an apocalyptic number.

520768947 is a deficient number, since it is larger than the sum of its proper divisors (176471773).

520768947 is a wasteful number, since it uses less digits than its factorization.

520768947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 720533.

The product of its (nonzero) digits is 846720, while the sum is 48.

The square root of 520768947 is about 22820.3625518965. The cubic root of 520768947 is about 804.5413315003.

The spelling of 520768947 in words is "five hundred twenty million, seven hundred sixty-eight thousand, nine hundred forty-seven".