520117879 has 2 divisors, whose sum is σ = 520117880. Its totient is φ = 520117878.

The previous prime is 520117867. The next prime is 520117889. The reversal of 520117879 is 978711025.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 520117879 - 2⁵ = 520117847 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (520117859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260058939 + 260058940.

It is an arithmetic number, because the mean of its divisors is an integer number (260058940).

Almost surely, 2^520117879 is an apocalyptic number.

520117879 is a deficient number, since it is larger than the sum of its proper divisors (1).

520117879 is an equidigital number, since it uses as much as digits as its factorization.

520117879 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 35280, while the sum is 40.

The square root of 520117879 is about 22806.0930235760. The cubic root of 520117879 is about 804.2059111181.

The spelling of 520117879 in words is "five hundred twenty million, one hundred seventeen thousand, eight hundred seventy-nine".