318728713 has 2 divisors, whose sum is σ = 318728714. Its totient is φ = 318728712.

The previous prime is 318728621. The next prime is 318728717. The reversal of 318728713 is 317827813.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 258309184 + 60419529 = 16072^2 + 7773^2 .

It is an emirp because it is prime and its reverse (317827813) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 318728713 - 2¹⁷ = 318597641 is a prime.

It is not a weakly prime, because it can be changed into another prime (318728717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159364356 + 159364357.

It is an arithmetic number, because the mean of its divisors is an integer number (159364357).

Almost surely, 2^318728713 is an apocalyptic number.

It is an amenable number.

318728713 is a deficient number, since it is larger than the sum of its proper divisors (1).

318728713 is an equidigital number, since it uses as much as digits as its factorization.

318728713 is an evil number, because the sum of its binary digits is even.

The product of its digits is 56448, while the sum is 40.

The square root of 318728713 is about 17852.9749061606. The cubic root of 318728713 is about 683.0833972851.

The spelling of 318728713 in words is "three hundred eighteen million, seven hundred twenty-eight thousand, seven hundred thirteen".