318973243 has 2 divisors, whose sum is σ = 318973244. Its totient is φ = 318973242.

The previous prime is 318973231. The next prime is 318973267. The reversal of 318973243 is 342379813.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-318973243 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 318973196 and 318973205.

It is not a weakly prime, because it can be changed into another prime (318973283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159486621 + 159486622.

It is an arithmetic number, because the mean of its divisors is an integer number (159486622).

Almost surely, 2^318973243 is an apocalyptic number.

318973243 is a deficient number, since it is larger than the sum of its proper divisors (1).

318973243 is an equidigital number, since it uses as much as digits as its factorization.

318973243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108864, while the sum is 40.

The square root of 318973243 is about 17859.8220315881. The cubic root of 318973243 is about 683.2580407756.

The spelling of 318973243 in words is "three hundred eighteen million, nine hundred seventy-three thousand, two hundred forty-three".