317368993 has 2 divisors, whose sum is σ = 317368994. Its totient is φ = 317368992.

The previous prime is 317368921. The next prime is 317369021. The reversal of 317368993 is 399863713.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 283181584 + 34187409 = 16828^2 + 5847^2 .

It is an emirp because it is prime and its reverse (399863713) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 317368993 - 2¹³ = 317360801 is a prime.

It is not a weakly prime, because it can be changed into another prime (317368193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 158684496 + 158684497.

It is an arithmetic number, because the mean of its divisors is an integer number (158684497).

Almost surely, 2^317368993 is an apocalyptic number.

It is an amenable number.

317368993 is a deficient number, since it is larger than the sum of its proper divisors (1).

317368993 is an equidigital number, since it uses as much as digits as its factorization.

317368993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 734832, while the sum is 49.

The square root of 317368993 is about 17814.8531568464. The cubic root of 317368993 is about 682.1106514592.

The spelling of 317368993 in words is "three hundred seventeen million, three hundred sixty-eight thousand, nine hundred ninety-three".