1317713185 has 4 divisors (see below), whose sum is σ = 1581255828. Its totient is φ = 1054170544.

The previous prime is 1317713183. The next prime is 1317713191. The reversal of 1317713185 is 5813177131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5813177131 = 2927 ⋅1986053.

It can be written as a sum of positive squares in 2 ways, for example, as 718883344 + 598829841 = 26812^2 + 24471^2 .

It is a cyclic number.

It is not a de Polignac number, because 1317713185 - 2¹ = 1317713183 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1317713183) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 131771314 + ... + 131771323.

It is an arithmetic number, because the mean of its divisors is an integer number (395313957).

Almost surely, 2^1317713185 is an apocalyptic number.

It is an amenable number.

1317713185 is a deficient number, since it is larger than the sum of its proper divisors (263542643).

1317713185 is an equidigital number, since it uses as much as digits as its factorization.

1317713185 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263542642.

The product of its digits is 17640, while the sum is 37.

The square root of 1317713185 is about 36300.3193512123. The cubic root of 1317713185 is about 1096.3274727069.

It can be divided in two parts, 13177 and 13185, that added together give a palindrome (26362).

The spelling of 1317713185 in words is "one billion, three hundred seventeen million, seven hundred thirteen thousand, one hundred eighty-five".