318147649 has 2 divisors, whose sum is σ = 318147650. Its totient is φ = 318147648.

The previous prime is 318147611. The next prime is 318147671. The reversal of 318147649 is 946741813.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 301890625 + 16257024 = 17375^2 + 4032^2 .

It is a cyclic number.

It is not a de Polignac number, because 318147649 - 2¹¹ = 318145601 is a prime.

It is not a weakly prime, because it can be changed into another prime (318147689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159073824 + 159073825.

It is an arithmetic number, because the mean of its divisors is an integer number (159073825).

Almost surely, 2^318147649 is an apocalyptic number.

It is an amenable number.

318147649 is a deficient number, since it is larger than the sum of its proper divisors (1).

318147649 is an equidigital number, since it uses as much as digits as its factorization.

318147649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145152, while the sum is 43.

The square root of 318147649 is about 17836.6938920866. The cubic root of 318147649 is about 682.6680423656.

The spelling of 318147649 in words is "three hundred eighteen million, one hundred forty-seven thousand, six hundred forty-nine".