1311210347 has 2 divisors, whose sum is σ = 1311210348. Its totient is φ = 1311210346.

The previous prime is 1311210343. The next prime is 1311210367. The reversal of 1311210347 is 7430121131.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1311210347 - 2² = 1311210343 is a prime.

It is not a weakly prime, because it can be changed into another prime (1311210343) 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, 655605173 + 655605174.

It is an arithmetic number, because the mean of its divisors is an integer number (655605174).

Almost surely, 2^1311210347 is an apocalyptic number.

1311210347 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311210347 is an equidigital number, since it uses as much as digits as its factorization.

1311210347 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 1311210347 is about 36210.6385886800. The cubic root of 1311210347 is about 1094.5210604690.

Adding to 1311210347 its reverse (7430121131), we get a palindrome (8741331478).

The spelling of 1311210347 in words is "one billion, three hundred eleven million, two hundred ten thousand, three hundred forty-seven".