518424857 has 2 divisors, whose sum is σ = 518424858. Its totient is φ = 518424856.

The previous prime is 518424839. The next prime is 518424859. The reversal of 518424857 is 758424815.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 494795536 + 23629321 = 22244^2 + 4861^2 .

It is a cyclic number.

It is not a de Polignac number, because 518424857 - 2¹⁶ = 518359321 is a prime.

Together with 518424859, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (518424859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 259212428 + 259212429.

It is an arithmetic number, because the mean of its divisors is an integer number (259212429).

Almost surely, 2^518424857 is an apocalyptic number.

It is an amenable number.

518424857 is a deficient number, since it is larger than the sum of its proper divisors (1).

518424857 is an equidigital number, since it uses as much as digits as its factorization.

518424857 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 358400, while the sum is 44.

The square root of 518424857 is about 22768.9450128898. The cubic root of 518424857 is about 803.3323794727.

The spelling of 518424857 in words is "five hundred eighteen million, four hundred twenty-four thousand, eight hundred fifty-seven".