317768137 has 2 divisors, whose sum is σ = 317768138. Its totient is φ = 317768136.

The previous prime is 317768123. The next prime is 317768149. The reversal of 317768137 is 731867713.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 181602576 + 136165561 = 13476^2 + 11669^2 .

It is an emirp because it is prime and its reverse (731867713) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-317768137 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 317768093 and 317768102.

It is not a weakly prime, because it can be changed into another prime (317768107) 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, 158884068 + 158884069.

It is an arithmetic number, because the mean of its divisors is an integer number (158884069).

Almost surely, 2^317768137 is an apocalyptic number.

It is an amenable number.

317768137 is a deficient number, since it is larger than the sum of its proper divisors (1).

317768137 is an equidigital number, since it uses as much as digits as its factorization.

317768137 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 148176, while the sum is 43.

The square root of 317768137 is about 17826.0521989587. The cubic root of 317768137 is about 682.3964873181.

The spelling of 317768137 in words is "three hundred seventeen million, seven hundred sixty-eight thousand, one hundred thirty-seven".