520939785 has 8 divisors (see below), whose sum is σ = 833503680. Its totient is φ = 277834544.

The previous prime is 520939763. The next prime is 520939801. The reversal of 520939785 is 587939025.

It is a happy number.

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 520939785 - 2¹² = 520935689 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17364645 + ... + 17364674.

It is an arithmetic number, because the mean of its divisors is an integer number (104187960).

Almost surely, 2^520939785 is an apocalyptic number.

It is an amenable number.

520939785 is a deficient number, since it is larger than the sum of its proper divisors (312563895).

520939785 is a wasteful number, since it uses less digits than its factorization.

520939785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34729327.

The product of its (nonzero) digits is 680400, while the sum is 48.

The square root of 520939785 is about 22824.1053493888. The cubic root of 520939785 is about 804.6292983462.

The spelling of 520939785 in words is "five hundred twenty million, nine hundred thirty-nine thousand, seven hundred eighty-five".