1311323207 has 2 divisors, whose sum is σ = 1311323208. Its totient is φ = 1311323206.

The previous prime is 1311323197. The next prime is 1311323239. The reversal of 1311323207 is 7023231131.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1311323207 - 2¹² = 1311319111 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1311323267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655661603 + 655661604.

It is an arithmetic number, because the mean of its divisors is an integer number (655661604).

Almost surely, 2^1311323207 is an apocalyptic number.

1311323207 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311323207 is an equidigital number, since it uses as much as digits as its factorization.

1311323207 is an evil number, because the sum of its binary digits is even.

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

The square root of 1311323207 is about 36212.1969369438. The cubic root of 1311323207 is about 1094.5524625252.

Adding to 1311323207 its reverse (7023231131), we get a palindrome (8334554338).

The spelling of 1311323207 in words is "one billion, three hundred eleven million, three hundred twenty-three thousand, two hundred seven".