318434309 has 2 divisors, whose sum is σ = 318434310. Its totient is φ = 318434308.

The previous prime is 318434273. The next prime is 318434323. The reversal of 318434309 is 903434813.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 194044900 + 124389409 = 13930^2 + 11153^2 .

It is an emirp because it is prime and its reverse (903434813) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-318434309 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (318434329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159217154 + 159217155.

It is an arithmetic number, because the mean of its divisors is an integer number (159217155).

Almost surely, 2^318434309 is an apocalyptic number.

It is an amenable number.

318434309 is a deficient number, since it is larger than the sum of its proper divisors (1).

318434309 is an equidigital number, since it uses as much as digits as its factorization.

318434309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104, while the sum is 35.

The square root of 318434309 is about 17844.7277648049. The cubic root of 318434309 is about 682.8730151991.

The spelling of 318434309 in words is "three hundred eighteen million, four hundred thirty-four thousand, three hundred nine".