1318895009 has 2 divisors, whose sum is σ = 1318895010. Its totient is φ = 1318895008.

The previous prime is 1318894991. The next prime is 1318895023. The reversal of 1318895009 is 9005988131.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1311888400 + 7006609 = 36220^2 + 2647^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1318895009 is a prime.

It is a super-2 number, since 2×1318895009² = 3478968089530220162, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1318895069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 659447504 + 659447505.

It is an arithmetic number, because the mean of its divisors is an integer number (659447505).

Almost surely, 2^1318895009 is an apocalyptic number.

It is an amenable number.

1318895009 is a deficient number, since it is larger than the sum of its proper divisors (1).

1318895009 is an equidigital number, since it uses as much as digits as its factorization.

1318895009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 77760, while the sum is 44.

The square root of 1318895009 is about 36316.5941272031. The cubic root of 1318895009 is about 1096.6551310007.

The spelling of 1318895009 in words is "one billion, three hundred eighteen million, eight hundred ninety-five thousand, nine".