318979009 has 2 divisors, whose sum is σ = 318979010. Its totient is φ = 318979008.

The previous prime is 318978991. The next prime is 318979079. The reversal of 318979009 is 900979813.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 298321984 + 20657025 = 17272^2 + 4545^2 .

It is an emirp because it is prime and its reverse (900979813) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 318979009 - 2²⁷ = 184761281 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 318979009.

It is not a weakly prime, because it can be changed into another prime (318979079) 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, 159489504 + 159489505.

It is an arithmetic number, because the mean of its divisors is an integer number (159489505).

Almost surely, 2^318979009 is an apocalyptic number.

It is an amenable number.

318979009 is a deficient number, since it is larger than the sum of its proper divisors (1).

318979009 is an equidigital number, since it uses as much as digits as its factorization.

318979009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 122472, while the sum is 46.

The square root of 318979009 is about 17859.9834546396. The cubic root of 318979009 is about 683.2621577793.

The spelling of 318979009 in words is "three hundred eighteen million, nine hundred seventy-nine thousand, nine".