318903943 has 2 divisors, whose sum is σ = 318903944. Its totient is φ = 318903942.

The previous prime is 318903941. The next prime is 318903971. The reversal of 318903943 is 349309813.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 318903943 - 2¹ = 318903941 is a prime.

Together with 318903941, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 318903896 and 318903905.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (318903941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159451971 + 159451972.

It is an arithmetic number, because the mean of its divisors is an integer number (159451972).

Almost surely, 2^318903943 is an apocalyptic number.

318903943 is a deficient number, since it is larger than the sum of its proper divisors (1).

318903943 is an equidigital number, since it uses as much as digits as its factorization.

318903943 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 69984, while the sum is 40.

The square root of 318903943 is about 17857.8818172817. The cubic root of 318903943 is about 683.2085557349.

The spelling of 318903943 in words is "three hundred eighteen million, nine hundred three thousand, nine hundred forty-three".