1313318117 has 2 divisors, whose sum is σ = 1313318118. Its totient is φ = 1313318116.

The previous prime is 1313318089. The next prime is 1313318129. The reversal of 1313318117 is 7118133131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 989354116 + 323964001 = 31454^2 + 17999^2 .

It is a cyclic number.

It is not a de Polignac number, because 1313318117 - 2⁶ = 1313318053 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1313318117.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1313318197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656659058 + 656659059.

It is an arithmetic number, because the mean of its divisors is an integer number (656659059).

Almost surely, 2^1313318117 is an apocalyptic number.

It is an amenable number.

1313318117 is a deficient number, since it is larger than the sum of its proper divisors (1).

1313318117 is an equidigital number, since it uses as much as digits as its factorization.

1313318117 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1512, while the sum is 29.

The square root of 1313318117 is about 36239.7311938154. The cubic root of 1313318117 is about 1095.1072271857.

The spelling of 1313318117 in words is "one billion, three hundred thirteen million, three hundred eighteen thousand, one hundred seventeen".