520117859 has 2 divisors, whose sum is σ = 520117860. Its totient is φ = 520117858.

The previous prime is 520117847. The next prime is 520117867. The reversal of 520117859 is 958711025.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-520117859 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (520117879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260058929 + 260058930.

It is an arithmetic number, because the mean of its divisors is an integer number (260058930).

Almost surely, 2^520117859 is an apocalyptic number.

520117859 is a deficient number, since it is larger than the sum of its proper divisors (1).

520117859 is an equidigital number, since it uses as much as digits as its factorization.

520117859 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25200, while the sum is 38.

The square root of 520117859 is about 22806.0925850966. The cubic root of 520117859 is about 804.2059008101.

The spelling of 520117859 in words is "five hundred twenty million, one hundred seventeen thousand, eight hundred fifty-nine".