1318636159 has 2 divisors, whose sum is σ = 1318636160. Its totient is φ = 1318636158.

The previous prime is 1318636147. The next prime is 1318636169. The reversal of 1318636159 is 9516368131.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (9516368131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1318636159 - 2⁷ = 1318636031 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1318636169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 659318079 + 659318080.

It is an arithmetic number, because the mean of its divisors is an integer number (659318080).

Almost surely, 2^1318636159 is an apocalyptic number.

1318636159 is a deficient number, since it is larger than the sum of its proper divisors (1).

1318636159 is an equidigital number, since it uses as much as digits as its factorization.

1318636159 is an evil number, because the sum of its binary digits is even.

The product of its digits is 116640, while the sum is 43.

The square root of 1318636159 is about 36313.0301544776. The cubic root of 1318636159 is about 1096.5833821120.

The spelling of 1318636159 in words is "one billion, three hundred eighteen million, six hundred thirty-six thousand, one hundred fifty-nine".