518118823 has 2 divisors, whose sum is σ = 518118824. Its totient is φ = 518118822.

The previous prime is 518118791. The next prime is 518118829. The reversal of 518118823 is 328811815.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 518118823 - 2⁵ = 518118791 is a prime.

It is a super-2 number, since 2×518118823² = 536894229493810658, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (518118829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 259059411 + 259059412.

It is an arithmetic number, because the mean of its divisors is an integer number (259059412).

Almost surely, 2^518118823 is an apocalyptic number.

518118823 is a deficient number, since it is larger than the sum of its proper divisors (1).

518118823 is an equidigital number, since it uses as much as digits as its factorization.

518118823 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15360, while the sum is 37.

The square root of 518118823 is about 22762.2235952466. The cubic root of 518118823 is about 803.1742752913.

The spelling of 518118823 in words is "five hundred eighteen million, one hundred eighteen thousand, eight hundred twenty-three".