520936385 has 4 divisors (see below), whose sum is σ = 625123668. Its totient is φ = 416749104.

The previous prime is 520936379. The next prime is 520936387. The reversal of 520936385 is 583639025.

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

It can be written as a sum of positive squares in 2 ways, for example, as 53684929 + 467251456 = 7327^2 + 21616^2 .

It is a cyclic number.

It is not a de Polignac number, because 520936385 - 2¹⁰ = 520935361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (520936387) 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, 52093634 + ... + 52093643.

It is an arithmetic number, because the mean of its divisors is an integer number (156280917).

Almost surely, 2^520936385 is an apocalyptic number.

It is an amenable number.

520936385 is a deficient number, since it is larger than the sum of its proper divisors (104187283).

520936385 is a wasteful number, since it uses less digits than its factorization.

520936385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104187282.

The product of its (nonzero) digits is 194400, while the sum is 41.

The square root of 520936385 is about 22824.0308666107. The cubic root of 520936385 is about 804.6275478268.

The spelling of 520936385 in words is "five hundred twenty million, nine hundred thirty-six thousand, three hundred eighty-five".