1318813117 has 2 divisors, whose sum is σ = 1318813118. Its totient is φ = 1318813116.

The previous prime is 1318813087. The next prime is 1318813121. The reversal of 1318813117 is 7113188131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1256418916 + 62394201 = 35446^2 + 7899^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1318813117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1318813187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 659406558 + 659406559.

It is an arithmetic number, because the mean of its divisors is an integer number (659406559).

Almost surely, 2^1318813117 is an apocalyptic number.

It is an amenable number.

1318813117 is a deficient number, since it is larger than the sum of its proper divisors (1).

1318813117 is an equidigital number, since it uses as much as digits as its factorization.

1318813117 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4032, while the sum is 34.

The square root of 1318813117 is about 36315.4666361318. The cubic root of 1318813117 is about 1096.6324329238.

The spelling of 1318813117 in words is "one billion, three hundred eighteen million, eight hundred thirteen thousand, one hundred seventeen".