518697313 has 2 divisors, whose sum is σ = 518697314. Its totient is φ = 518697312.

The previous prime is 518697299. The next prime is 518697323. The reversal of 518697313 is 313796815.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 361646289 + 157051024 = 19017^2 + 12532^2 .

It is a cyclic number.

It is not a de Polignac number, because 518697313 - 2¹³ = 518689121 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 518697313.

It is not a weakly prime, because it can be changed into another prime (518697323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 259348656 + 259348657.

It is an arithmetic number, because the mean of its divisors is an integer number (259348657).

Almost surely, 2^518697313 is an apocalyptic number.

It is an amenable number.

518697313 is a deficient number, since it is larger than the sum of its proper divisors (1).

518697313 is an equidigital number, since it uses as much as digits as its factorization.

518697313 is an evil number, because the sum of its binary digits is even.

The product of its digits is 136080, while the sum is 43.

The square root of 518697313 is about 22774.9272885777. The cubic root of 518697313 is about 803.4730841428.

The spelling of 518697313 in words is "five hundred eighteen million, six hundred ninety-seven thousand, three hundred thirteen".