1311203347 has 2 divisors, whose sum is σ = 1311203348. Its totient is φ = 1311203346.

The previous prime is 1311203323. The next prime is 1311203371. The reversal of 1311203347 is 7433021131.

It is a balanced prime because it is at equal distance from previous prime (1311203323) and next prime (1311203371).

It is a cyclic number.

It is not a de Polignac number, because 1311203347 - 2⁷ = 1311203219 is a prime.

It is not a weakly prime, because it can be changed into another prime (1311203317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655601673 + 655601674.

It is an arithmetic number, because the mean of its divisors is an integer number (655601674).

Almost surely, 2^1311203347 is an apocalyptic number.

1311203347 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311203347 is an equidigital number, since it uses as much as digits as its factorization.

1311203347 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1512, while the sum is 25.

The square root of 1311203347 is about 36210.5419318739. The cubic root of 1311203347 is about 1094.5191127365.

Adding to 1311203347 its reverse (7433021131), we get a palindrome (8744224478).

The spelling of 1311203347 in words is "one billion, three hundred eleven million, two hundred three thousand, three hundred forty-seven".