263320512017 has 2 divisors, whose sum is σ = 263320512018. Its totient is φ = 263320512016.

The previous prime is 263320511989. The next prime is 263320512029. The reversal of 263320512017 is 710215023362.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 162679928896 + 100640583121 = 403336^2 + 317239^2 .

It is a cyclic number.

It is not a de Polignac number, because 263320512017 - 2²² = 263316317713 is a prime.

It is not a weakly prime, because it can be changed into another prime (263320512067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131660256008 + 131660256009.

It is an arithmetic number, because the mean of its divisors is an integer number (131660256009).

Almost surely, 2^263320512017 is an apocalyptic number.

It is an amenable number.

263320512017 is a deficient number, since it is larger than the sum of its proper divisors (1).

263320512017 is an equidigital number, since it uses as much as digits as its factorization.

263320512017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15120, while the sum is 32.

Adding to 263320512017 its reverse (710215023362), we get a palindrome (973535535379).

The spelling of 263320512017 in words is "two hundred sixty-three billion, three hundred twenty million, five hundred twelve thousand, seventeen".