318942647 has 2 divisors, whose sum is σ = 318942648. Its totient is φ = 318942646.

The previous prime is 318942641. The next prime is 318942677. The reversal of 318942647 is 746249813.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 318942647 - 2⁸ = 318942391 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 318942598 and 318942607.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (318942641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159471323 + 159471324.

It is an arithmetic number, because the mean of its divisors is an integer number (159471324).

Almost surely, 2^318942647 is an apocalyptic number.

318942647 is a deficient number, since it is larger than the sum of its proper divisors (1).

318942647 is an equidigital number, since it uses as much as digits as its factorization.

318942647 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 290304, while the sum is 44.

The square root of 318942647 is about 17858.9654515596. The cubic root of 318942647 is about 683.2361939782.

The spelling of 318942647 in words is "three hundred eighteen million, nine hundred forty-two thousand, six hundred forty-seven".