1323905213 has 2 divisors, whose sum is σ = 1323905214. Its totient is φ = 1323905212.

The previous prime is 1323905119. The next prime is 1323905239. The reversal of 1323905213 is 3125093231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1180815769 + 143089444 = 34363^2 + 11962^2 .

It is a cyclic number.

It is not a de Polignac number, because 1323905213 - 2²⁰ = 1322856637 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1323908213) 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, 661952606 + 661952607.

It is an arithmetic number, because the mean of its divisors is an integer number (661952607).

Almost surely, 2^1323905213 is an apocalyptic number.

It is an amenable number.

1323905213 is a deficient number, since it is larger than the sum of its proper divisors (1).

1323905213 is an equidigital number, since it uses as much as digits as its factorization.

1323905213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4860, while the sum is 29.

The square root of 1323905213 is about 36385.5082828315. The cubic root of 1323905213 is about 1098.0420301583.

Adding to 1323905213 its reverse (3125093231), we get a palindrome (4448998444).

The spelling of 1323905213 in words is "one billion, three hundred twenty-three million, nine hundred five thousand, two hundred thirteen".