1323130309 has 2 divisors, whose sum is σ = 1323130310. Its totient is φ = 1323130308.

The previous prime is 1323130301. The next prime is 1323130327. The reversal of 1323130309 is 9030313231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 743380225 + 579750084 = 27265^2 + 24078^2 .

It is an emirp because it is prime and its reverse (9030313231) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1323130309 - 2³ = 1323130301 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1323130301) 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, 661565154 + 661565155.

It is an arithmetic number, because the mean of its divisors is an integer number (661565155).

Almost surely, 2^1323130309 is an apocalyptic number.

It is an amenable number.

1323130309 is a deficient number, since it is larger than the sum of its proper divisors (1).

1323130309 is an equidigital number, since it uses as much as digits as its factorization.

1323130309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1458, while the sum is 25.

The square root of 1323130309 is about 36374.8581990363. The cubic root of 1323130309 is about 1097.8277541870.

The spelling of 1323130309 in words is "one billion, three hundred twenty-three million, one hundred thirty thousand, three hundred nine".