520425647 has 4 divisors (see below), whose sum is σ = 594772176. Its totient is φ = 446079120.

The previous prime is 520425643. The next prime is 520425667. The reversal of 520425647 is 746524025.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 520425647 - 2² = 520425643 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520425643) 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, 37173254 + ... + 37173267.

It is an arithmetic number, because the mean of its divisors is an integer number (148693044).

Almost surely, 2^520425647 is an apocalyptic number.

520425647 is a deficient number, since it is larger than the sum of its proper divisors (74346529).

520425647 is an equidigital number, since it uses as much as digits as its factorization.

520425647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74346528.

The product of its (nonzero) digits is 67200, while the sum is 35.

The square root of 520425647 is about 22812.8395207611. The cubic root of 520425647 is about 804.3645033986.

The spelling of 520425647 in words is "five hundred twenty million, four hundred twenty-five thousand, six hundred forty-seven".