518314609 has 2 divisors, whose sum is σ = 518314610. Its totient is φ = 518314608.

The previous prime is 518314549. The next prime is 518314631. The reversal of 518314609 is 906413815.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 385258384 + 133056225 = 19628^2 + 11535^2 .

It is a cyclic number.

It is not a de Polignac number, because 518314609 - 2⁷ = 518314481 is a prime.

It is not a weakly prime, because it can be changed into another prime (518314639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 259157304 + 259157305.

It is an arithmetic number, because the mean of its divisors is an integer number (259157305).

Almost surely, 2^518314609 is an apocalyptic number.

It is an amenable number.

518314609 is a deficient number, since it is larger than the sum of its proper divisors (1).

518314609 is an equidigital number, since it uses as much as digits as its factorization.

518314609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 518314609 is about 22766.5238672925. The cubic root of 518314609 is about 803.2754299998.

The spelling of 518314609 in words is "five hundred eighteen million, three hundred fourteen thousand, six hundred nine".