318394920647 has 2 divisors, whose sum is σ = 318394920648. Its totient is φ = 318394920646.

The previous prime is 318394920617. The next prime is 318394920673. The reversal of 318394920647 is 746029493813.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 318394920647 - 2¹² = 318394916551 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 318394920592 and 318394920601.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (318394920617) 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, 159197460323 + 159197460324.

It is an arithmetic number, because the mean of its divisors is an integer number (159197460324).

Almost surely, 2^318394920647 is an apocalyptic number.

318394920647 is a deficient number, since it is larger than the sum of its proper divisors (1).

318394920647 is an equidigital number, since it uses as much as digits as its factorization.

318394920647 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7838208, while the sum is 56.

The spelling of 318394920647 in words is "three hundred eighteen billion, three hundred ninety-four million, nine hundred twenty thousand, six hundred forty-seven".