318214775309 has 2 divisors, whose sum is σ = 318214775310. Its totient is φ = 318214775308.

The previous prime is 318214775297. The next prime is 318214775479. The reversal of 318214775309 is 903577412813.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 314709780100 + 3504995209 = 560990^2 + 59203^2 .

It is a cyclic number.

It is not a de Polignac number, because 318214775309 - 2¹² = 318214771213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (318214475309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159107387654 + 159107387655.

It is an arithmetic number, because the mean of its divisors is an integer number (159107387655).

Almost surely, 2^318214775309 is an apocalyptic number.

It is an amenable number.

318214775309 is a deficient number, since it is larger than the sum of its proper divisors (1).

318214775309 is an equidigital number, since it uses as much as digits as its factorization.

318214775309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1270080, while the sum is 50.

The spelling of 318214775309 in words is "three hundred eighteen billion, two hundred fourteen million, seven hundred seventy-five thousand, three hundred nine".