520105647 has 8 divisors (see below), whose sum is σ = 723625344. Its totient is φ = 331661528.

The previous prime is 520105627. The next prime is 520105673. The reversal of 520105647 is 746501025.

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 520105647 - 2⁶ = 520105583 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520105627) 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, 3768813 + ... + 3768950.

It is an arithmetic number, because the mean of its divisors is an integer number (90453168).

Almost surely, 2^520105647 is an apocalyptic number.

520105647 is a deficient number, since it is larger than the sum of its proper divisors (203519697).

520105647 is a wasteful number, since it uses less digits than its factorization.

520105647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7537789.

The product of its (nonzero) digits is 8400, while the sum is 30.

The square root of 520105647 is about 22805.8248480514. The cubic root of 520105647 is about 804.1996066986.

The spelling of 520105647 in words is "five hundred twenty million, one hundred five thousand, six hundred forty-seven".