1317291313 has 4 divisors (see below), whose sum is σ = 1418621428. Its totient is φ = 1215961200.

The previous prime is 1317291307. The next prime is 1317291319. The reversal of 1317291313 is 3131927131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3131927131 = 4177 ⋅749803.

It is an interprime number because it is at equal distance from previous prime (1317291307) and next prime (1317291319).

It can be written as a sum of positive squares in 2 ways, for example, as 235407649 + 1081883664 = 15343^2 + 32892^2 .

It is a cyclic number.

It is not a de Polignac number, because 1317291313 - 2⁹ = 1317290801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1317291319) 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, 50665038 + ... + 50665063.

It is an arithmetic number, because the mean of its divisors is an integer number (354655357).

Almost surely, 2^1317291313 is an apocalyptic number.

1317291313 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1317291313 is a deficient number, since it is larger than the sum of its proper divisors (101330115).

1317291313 is a wasteful number, since it uses less digits than its factorization.

1317291313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101330114.

The product of its digits is 3402, while the sum is 31.

The square root of 1317291313 is about 36294.5080280750. The cubic root of 1317291313 is about 1096.2104621070.

The spelling of 1317291313 in words is "one billion, three hundred seventeen million, two hundred ninety-one thousand, three hundred thirteen".