520268857 has 2 divisors, whose sum is σ = 520268858. Its totient is φ = 520268856.

The previous prime is 520268851. The next prime is 520268873. The reversal of 520268857 is 758862025.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 327031056 + 193237801 = 18084^2 + 13901^2 .

It is a cyclic number.

It is not a de Polignac number, because 520268857 - 2²⁷ = 386051129 is a prime.

It is not a weakly prime, because it can be changed into another prime (520268851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260134428 + 260134429.

It is an arithmetic number, because the mean of its divisors is an integer number (260134429).

Almost surely, 2^520268857 is an apocalyptic number.

It is an amenable number.

520268857 is a deficient number, since it is larger than the sum of its proper divisors (1).

520268857 is an equidigital number, since it uses as much as digits as its factorization.

520268857 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 268800, while the sum is 43.

The square root of 520268857 is about 22809.4028198899. The cubic root of 520268857 is about 804.2837176171.

It can be divided in two parts, 520268 and 857, that added together give a palindrome (521125).

The spelling of 520268857 in words is "five hundred twenty million, two hundred sixty-eight thousand, eight hundred fifty-seven".