318288947 has 2 divisors, whose sum is σ = 318288948. Its totient is φ = 318288946.

The previous prime is 318288937. The next prime is 318288983. The reversal of 318288947 is 749882813.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 318288947 - 2¹² = 318284851 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 318288895 and 318288904.

It is not a weakly prime, because it can be changed into another prime (318288917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159144473 + 159144474.

It is an arithmetic number, because the mean of its divisors is an integer number (159144474).

Almost surely, 2^318288947 is an apocalyptic number.

318288947 is a deficient number, since it is larger than the sum of its proper divisors (1).

318288947 is an equidigital number, since it uses as much as digits as its factorization.

318288947 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 774144, while the sum is 50.

The square root of 318288947 is about 17840.6543321707. The cubic root of 318288947 is about 682.7690912054.

It can be divided in two parts, 3182 and 88947, that added together give a palindrome (92129).

The spelling of 318288947 in words is "three hundred eighteen million, two hundred eighty-eight thousand, nine hundred forty-seven".