318349613 has 2 divisors, whose sum is σ = 318349614. Its totient is φ = 318349612.

The previous prime is 318349609. The next prime is 318349631. The reversal of 318349613 is 316943813.

It is a happy number.

Together with next prime (318349631) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 274299844 + 44049769 = 16562^2 + 6637^2 .

It is a cyclic number.

It is not a de Polignac number, because 318349613 - 2² = 318349609 is a prime.

It is a super-3 number, since 3×318349613³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (318349643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159174806 + 159174807.

It is an arithmetic number, because the mean of its divisors is an integer number (159174807).

Almost surely, 2^318349613 is an apocalyptic number.

It is an amenable number.

318349613 is a deficient number, since it is larger than the sum of its proper divisors (1).

318349613 is an equidigital number, since it uses as much as digits as its factorization.

318349613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46656, while the sum is 38.

The square root of 318349613 is about 17842.3544690716. The cubic root of 318349613 is about 682.8124671365.

The spelling of 318349613 in words is "three hundred eighteen million, three hundred forty-nine thousand, six hundred thirteen".