1313018309 has 2 divisors, whose sum is σ = 1313018310. Its totient is φ = 1313018308.

The previous prime is 1313018279. The next prime is 1313018339. The reversal of 1313018309 is 9038103131.

It is a balanced prime because it is at equal distance from previous prime (1313018279) and next prime (1313018339).

It can be written as a sum of positive squares in only one way, i.e., 702780100 + 610238209 = 26510^2 + 24703^2 .

It is a cyclic number.

It is not a de Polignac number, because 1313018309 - 2²⁰ = 1311969733 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1313018339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656509154 + 656509155.

It is an arithmetic number, because the mean of its divisors is an integer number (656509155).

Almost surely, 2^1313018309 is an apocalyptic number.

It is an amenable number.

1313018309 is a deficient number, since it is larger than the sum of its proper divisors (1).

1313018309 is an equidigital number, since it uses as much as digits as its factorization.

1313018309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 1313018309 is about 36235.5945031953. The cubic root of 1313018309 is about 1095.0238894450.

The spelling of 1313018309 in words is "one billion, three hundred thirteen million, eighteen thousand, three hundred nine".