316660243 has 2 divisors, whose sum is σ = 316660244. Its totient is φ = 316660242.

The previous prime is 316660217. The next prime is 316660247. The reversal of 316660243 is 342066613.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-316660243 is a prime.

It is not a weakly prime, because it can be changed into another prime (316660247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 158330121 + 158330122.

It is an arithmetic number, because the mean of its divisors is an integer number (158330122).

Almost surely, 2^316660243 is an apocalyptic number.

316660243 is a deficient number, since it is larger than the sum of its proper divisors (1).

316660243 is an equidigital number, since it uses as much as digits as its factorization.

316660243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 31.

The square root of 316660243 is about 17794.9499296851. The cubic root of 316660243 is about 681.6025087190.

The spelling of 316660243 in words is "three hundred sixteen million, six hundred sixty thousand, two hundred forty-three".