1311330109 has 2 divisors, whose sum is σ = 1311330110. Its totient is φ = 1311330108.

The previous prime is 1311330103. The next prime is 1311330133. The reversal of 1311330109 is 9010331131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1054625625 + 256704484 = 32475^2 + 16022^2 .

It is a cyclic number.

It is not a de Polignac number, because 1311330109 - 2²⁵ = 1277775677 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1311330109.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1311330103) 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, 655665054 + 655665055.

It is an arithmetic number, because the mean of its divisors is an integer number (655665055).

Almost surely, 2^1311330109 is an apocalyptic number.

It is an amenable number.

1311330109 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311330109 is an equidigital number, since it uses as much as digits as its factorization.

1311330109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 243, while the sum is 22.

The square root of 1311330109 is about 36212.2922362007. The cubic root of 1311330109 is about 1094.5543828724.

The spelling of 1311330109 in words is "one billion, three hundred eleven million, three hundred thirty thousand, one hundred nine".