317138761 has 2 divisors, whose sum is σ = 317138762. Its totient is φ = 317138760.

The previous prime is 317138741. The next prime is 317138777. The reversal of 317138761 is 167831713.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 315275536 + 1863225 = 17756^2 + 1365^2 .

It is a cyclic number.

It is not a de Polignac number, because 317138761 - 2¹¹ = 317136713 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 317138761.

It is not a weakly prime, because it can be changed into another prime (317138741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 158569380 + 158569381.

It is an arithmetic number, because the mean of its divisors is an integer number (158569381).

Almost surely, 2^317138761 is an apocalyptic number.

It is an amenable number.

317138761 is a deficient number, since it is larger than the sum of its proper divisors (1).

317138761 is an equidigital number, since it uses as much as digits as its factorization.

317138761 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21168, while the sum is 37.

The square root of 317138761 is about 17808.3901855277. The cubic root of 317138761 is about 681.9456682236.

The spelling of 317138761 in words is "three hundred seventeen million, one hundred thirty-eight thousand, seven hundred sixty-one".