1318321769 has 2 divisors, whose sum is σ = 1318321770. Its totient is φ = 1318321768.

The previous prime is 1318321703. The next prime is 1318321777. The reversal of 1318321769 is 9671238131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1196329744 + 121992025 = 34588^2 + 11045^2 .

It is a cyclic number.

It is not a de Polignac number, because 1318321769 - 2¹² = 1318317673 is a prime.

It is a super-2 number, since 2×1318321769² = 3475944573238578722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1318321799) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 659160884 + 659160885.

It is an arithmetic number, because the mean of its divisors is an integer number (659160885).

Almost surely, 2^1318321769 is an apocalyptic number.

It is an amenable number.

1318321769 is a deficient number, since it is larger than the sum of its proper divisors (1).

1318321769 is an equidigital number, since it uses as much as digits as its factorization.

1318321769 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54432, while the sum is 41.

The square root of 1318321769 is about 36308.7010095376. The cubic root of 1318321769 is about 1096.4962258357.

The spelling of 1318321769 in words is "one billion, three hundred eighteen million, three hundred twenty-one thousand, seven hundred sixty-nine".