318430663 has 2 divisors, whose sum is σ = 318430664. Its totient is φ = 318430662.

The previous prime is 318430657. The next prime is 318430681. The reversal of 318430663 is 366034813.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 318430663 - 2¹⁷ = 318299591 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (318460663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159215331 + 159215332.

It is an arithmetic number, because the mean of its divisors is an integer number (159215332).

Almost surely, 2^318430663 is an apocalyptic number.

318430663 is a deficient number, since it is larger than the sum of its proper divisors (1).

318430663 is an equidigital number, since it uses as much as digits as its factorization.

318430663 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104, while the sum is 34.

The square root of 318430663 is about 17844.6256054869. The cubic root of 318430663 is about 682.8704089425.

The spelling of 318430663 in words is "three hundred eighteen million, four hundred thirty thousand, six hundred sixty-three".