520647379 has 8 divisors (see below), whose sum is σ = 596354400. Its totient is φ = 445272576.

The previous prime is 520647373. The next prime is 520647401. The reversal of 520647379 is 973746025.

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

It is not a de Polignac number, because 520647379 - 2²³ = 512258771 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (520647373) 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, 79684 + ... + 85969.

It is an arithmetic number, because the mean of its divisors is an integer number (74544300).

Almost surely, 2^520647379 is an apocalyptic number.

520647379 is a deficient number, since it is larger than the sum of its proper divisors (75707021).

520647379 is a wasteful number, since it uses less digits than its factorization.

520647379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166109.

The product of its (nonzero) digits is 317520, while the sum is 43.

The square root of 520647379 is about 22817.6988103533. The cubic root of 520647379 is about 804.4787227415.

The spelling of 520647379 in words is "five hundred twenty million, six hundred forty-seven thousand, three hundred seventy-nine".