1317917 has 2 divisors, whose sum is σ = 1317918. Its totient is φ = 1317916.

The previous prime is 1317887. The next prime is 1317929. The reversal of 1317917 is 7197131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 900601 + 417316 = 949^2 + 646^2 .

It is an emirp because it is prime and its reverse (7197131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1317917 - 2⁶ = 1317853 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1317917.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1317947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 658958 + 658959.

It is an arithmetic number, because the mean of its divisors is an integer number (658959).

2^1317917 is an apocalyptic number.

It is an amenable number.

1317917 is a deficient number, since it is larger than the sum of its proper divisors (1).

1317917 is an equidigital number, since it uses as much as digits as its factorization.

1317917 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1323, while the sum is 29.

The square root of 1317917 is about 1148.0056620069. The cubic root of 1317917 is about 109.6383993976.

The spelling of 1317917 in words is "one million, three hundred seventeen thousand, nine hundred seventeen".