520643079 has 16 divisors (see below), whose sum is σ = 841443840. Its totient is φ = 315541080.

The previous prime is 520643063. The next prime is 520643087. The reversal of 520643079 is 970346025.

520643079 is a `hidden beast` number, since 5 + 2 + 0 + 643 + 0 + 7 + 9 = 666.

It is not a de Polignac number, because 520643079 - 2⁴ = 520643063 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520643029) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 876207 + ... + 876800.

It is an arithmetic number, because the mean of its divisors is an integer number (52590240).

Almost surely, 2^520643079 is an apocalyptic number.

520643079 is a deficient number, since it is larger than the sum of its proper divisors (320800761).

520643079 is a wasteful number, since it uses less digits than its factorization.

520643079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1753027 (or 1753021 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 36.

The square root of 520643079 is about 22817.6045850567. The cubic root of 520643079 is about 804.4765080193.

The spelling of 520643079 in words is "five hundred twenty million, six hundred forty-three thousand, seventy-nine".