1323131207 has 2 divisors, whose sum is σ = 1323131208. Its totient is φ = 1323131206.

The previous prime is 1323131197. The next prime is 1323131237. The reversal of 1323131207 is 7021313231.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1323131207 - 2¹⁶ = 1323065671 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1323131237) 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, 661565603 + 661565604.

It is an arithmetic number, because the mean of its divisors is an integer number (661565604).

Almost surely, 2^1323131207 is an apocalyptic number.

1323131207 is a deficient number, since it is larger than the sum of its proper divisors (1).

1323131207 is an equidigital number, since it uses as much as digits as its factorization.

1323131207 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 756, while the sum is 23.

The square root of 1323131207 is about 36374.8705427250. The cubic root of 1323131207 is about 1097.8280025498.

Adding to 1323131207 its reverse (7021313231), we get a palindrome (8344444438).

The spelling of 1323131207 in words is "one billion, three hundred twenty-three million, one hundred thirty-one thousand, two hundred seven".