520023017 has 2 divisors, whose sum is σ = 520023018. Its totient is φ = 520023016.

The previous prime is 520022969. The next prime is 520023073. The reversal of 520023017 is 710320025.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 315275536 + 204747481 = 17756^2 + 14309^2 .

It is a cyclic number.

It is not a de Polignac number, because 520023017 - 2⁶ = 520022953 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 520023017.

It is not a weakly prime, because it can be changed into another prime (520028017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260011508 + 260011509.

It is an arithmetic number, because the mean of its divisors is an integer number (260011509).

Almost surely, 2^520023017 is an apocalyptic number.

It is an amenable number.

520023017 is a deficient number, since it is larger than the sum of its proper divisors (1).

520023017 is an equidigital number, since it uses as much as digits as its factorization.

520023017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 420, while the sum is 20.

The square root of 520023017 is about 22804.0131775089. The cubic root of 520023017 is about 804.1570162921.

The spelling of 520023017 in words is "five hundred twenty million, twenty-three thousand, seventeen".