318323009 has 2 divisors, whose sum is σ = 318323010. Its totient is φ = 318323008.

The previous prime is 318323003. The next prime is 318323021. The reversal of 318323009 is 900323813.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 210163009 + 108160000 = 14497^2 + 10400^2 .

It is an emirp because it is prime and its reverse (900323813) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 318323009 - 2¹⁶ = 318257473 is a prime.

It is not a weakly prime, because it can be changed into another prime (318323003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159161504 + 159161505.

It is an arithmetic number, because the mean of its divisors is an integer number (159161505).

Almost surely, 2^318323009 is an apocalyptic number.

It is an amenable number.

318323009 is a deficient number, since it is larger than the sum of its proper divisors (1).

318323009 is an equidigital number, since it uses as much as digits as its factorization.

318323009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 318323009 is about 17841.6089240853. The cubic root of 318323009 is about 682.7934460685.

The spelling of 318323009 in words is "three hundred eighteen million, three hundred twenty-three thousand, nine".