318744857 has 2 divisors, whose sum is σ = 318744858. Its totient is φ = 318744856.

The previous prime is 318744793. The next prime is 318744859. The reversal of 318744857 is 758447813.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 248503696 + 70241161 = 15764^2 + 8381^2 .

It is a cyclic number.

It is not a de Polignac number, because 318744857 - 2⁶ = 318744793 is a prime.

Together with 318744859, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (318744859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159372428 + 159372429.

It is an arithmetic number, because the mean of its divisors is an integer number (159372429).

Almost surely, 2^318744857 is an apocalyptic number.

It is an amenable number.

318744857 is a deficient number, since it is larger than the sum of its proper divisors (1).

318744857 is an equidigital number, since it uses as much as digits as its factorization.

318744857 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 752640, while the sum is 47.

The square root of 318744857 is about 17853.4270379667. The cubic root of 318744857 is about 683.0949300942.

The spelling of 318744857 in words is "three hundred eighteen million, seven hundred forty-four thousand, eight hundred fifty-seven".