1323011309 has 2 divisors, whose sum is σ = 1323011310. Its totient is φ = 1323011308.

The previous prime is 1323011299. The next prime is 1323011311. The reversal of 1323011309 is 9031103231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1003495684 + 319515625 = 31678^2 + 17875^2 .

It is a cyclic number.

It is not a de Polignac number, because 1323011309 - 2²⁴ = 1306234093 is a prime.

Together with 1323011311, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1323011369) 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, 661505654 + 661505655.

It is an arithmetic number, because the mean of its divisors is an integer number (661505655).

Almost surely, 2^1323011309 is an apocalyptic number.

It is an amenable number.

1323011309 is a deficient number, since it is larger than the sum of its proper divisors (1).

1323011309 is an equidigital number, since it uses as much as digits as its factorization.

1323011309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 486, while the sum is 23.

The square root of 1323011309 is about 36373.2224170474. Note that the first 3 decimals coincide. The cubic root of 1323011309 is about 1097.7948409714.

The spelling of 1323011309 in words is "one billion, three hundred twenty-three million, eleven thousand, three hundred nine".