1317713191 has 2 divisors, whose sum is σ = 1317713192. Its totient is φ = 1317713190.

The previous prime is 1317713183. The next prime is 1317713203. The reversal of 1317713191 is 1913177131.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1317713191 - 2³ = 1317713183 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1317713101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 658856595 + 658856596.

It is an arithmetic number, because the mean of its divisors is an integer number (658856596).

Almost surely, 2^1317713191 is an apocalyptic number.

1317713191 is a deficient number, since it is larger than the sum of its proper divisors (1).

1317713191 is an equidigital number, since it uses as much as digits as its factorization.

1317713191 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3969, while the sum is 34.

The square root of 1317713191 is about 36300.3194338562. The cubic root of 1317713191 is about 1096.3274743708.

It can be divided in two parts, 1317713 and 191, that added together give a square (1317904 = 1148²).

The spelling of 1317713191 in words is "one billion, three hundred seventeen million, seven hundred thirteen thousand, one hundred ninety-one".