518685073 has 2 divisors, whose sum is σ = 518685074. Its totient is φ = 518685072.

The previous prime is 518685023. The next prime is 518685077. The reversal of 518685073 is 370586815.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 512886609 + 5798464 = 22647^2 + 2408^2 .

It is a cyclic number.

It is not a de Polignac number, because 518685073 - 2⁹ = 518684561 is a prime.

It is not a weakly prime, because it can be changed into another prime (518685077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 259342536 + 259342537.

It is an arithmetic number, because the mean of its divisors is an integer number (259342537).

Almost surely, 2^518685073 is an apocalyptic number.

It is an amenable number.

518685073 is a deficient number, since it is larger than the sum of its proper divisors (1).

518685073 is an equidigital number, since it uses as much as digits as its factorization.

518685073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 201600, while the sum is 43.

The square root of 518685073 is about 22774.6585704375. The cubic root of 518685073 is about 803.4667640870.

The spelling of 518685073 in words is "five hundred eighteen million, six hundred eighty-five thousand, seventy-three".