1318007813 has 2 divisors, whose sum is σ = 1318007814. Its totient is φ = 1318007812.

The previous prime is 1318007783. The next prime is 1318007819. The reversal of 1318007813 is 3187008131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 711715684 + 606292129 = 26678^2 + 24623^2 .

It is an emirp because it is prime and its reverse (3187008131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1318007813 - 2⁸ = 1318007557 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1318007813.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1318007819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 659003906 + 659003907.

It is an arithmetic number, because the mean of its divisors is an integer number (659003907).

Almost surely, 2^1318007813 is an apocalyptic number.

It is an amenable number.

1318007813 is a deficient number, since it is larger than the sum of its proper divisors (1).

1318007813 is an equidigital number, since it uses as much as digits as its factorization.

1318007813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 32.

The square root of 1318007813 is about 36304.3773256063. The cubic root of 1318007813 is about 1096.4091760455.

The spelling of 1318007813 in words is "one billion, three hundred eighteen million, seven thousand, eight hundred thirteen".