518129957 has 2 divisors, whose sum is σ = 518129958. Its totient is φ = 518129956.

The previous prime is 518129881. The next prime is 518129959. The reversal of 518129957 is 759921815.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 500372161 + 17757796 = 22369^2 + 4214^2 .

It is a cyclic number.

It is not a de Polignac number, because 518129957 - 2²⁶ = 451021093 is a prime.

Together with 518129959, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (518129959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 259064978 + 259064979.

It is an arithmetic number, because the mean of its divisors is an integer number (259064979).

Almost surely, 2^518129957 is an apocalyptic number.

It is an amenable number.

518129957 is a deficient number, since it is larger than the sum of its proper divisors (1).

518129957 is an equidigital number, since it uses as much as digits as its factorization.

518129957 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 226800, while the sum is 47.

The square root of 518129957 is about 22762.4681658207. The cubic root of 518129957 is about 803.1800284621.

The spelling of 518129957 in words is "five hundred eighteen million, one hundred twenty-nine thousand, nine hundred fifty-seven".