1317511171 has 2 divisors, whose sum is σ = 1317511172. Its totient is φ = 1317511170.

The previous prime is 1317511157. The next prime is 1317511177. The reversal of 1317511171 is 1711157131.

It is a strong prime.

It is an emirp because it is prime and its reverse (1711157131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1317511171 - 2¹⁵ = 1317478403 is a prime.

It is not a weakly prime, because it can be changed into another prime (1317511177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 658755585 + 658755586.

It is an arithmetic number, because the mean of its divisors is an integer number (658755586).

Almost surely, 2^1317511171 is an apocalyptic number.

1317511171 is a deficient number, since it is larger than the sum of its proper divisors (1).

1317511171 is an equidigital number, since it uses as much as digits as its factorization.

1317511171 is an evil number, because the sum of its binary digits is even.

The product of its digits is 735, while the sum is 28.

The square root of 1317511171 is about 36297.5367070549. The cubic root of 1317511171 is about 1096.2714451334.

The spelling of 1317511171 in words is "one billion, three hundred seventeen million, five hundred eleven thousand, one hundred seventy-one".