318030409 has 2 divisors, whose sum is σ = 318030410. Its totient is φ = 318030408.

The previous prime is 318030397. The next prime is 318030431. The reversal of 318030409 is 904030813.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 294294025 + 23736384 = 17155^2 + 4872^2 .

It is a cyclic number.

It is not a de Polignac number, because 318030409 - 2¹³ = 318022217 is a prime.

It is a super-2 number, since 2×318030409² = 202286682097414562, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (318030469) 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, 159015204 + 159015205.

It is an arithmetic number, because the mean of its divisors is an integer number (159015205).

Almost surely, 2^318030409 is an apocalyptic number.

It is an amenable number.

318030409 is a deficient number, since it is larger than the sum of its proper divisors (1).

318030409 is an equidigital number, since it uses as much as digits as its factorization.

318030409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 318030409 is about 17833.4071057664. The cubic root of 318030409 is about 682.5841758182.

The spelling of 318030409 in words is "three hundred eighteen million, thirty thousand, four hundred nine".