1311334289 has 2 divisors, whose sum is σ = 1311334290. Its totient is φ = 1311334288.

The previous prime is 1311334223. The next prime is 1311334301. The reversal of 1311334289 is 9824331131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1289169025 + 22165264 = 35905^2 + 4708^2 .

It is a cyclic number.

It is not a de Polignac number, because 1311334289 - 2⁸ = 1311334033 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1311334889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655667144 + 655667145.

It is an arithmetic number, because the mean of its divisors is an integer number (655667145).

Almost surely, 2^1311334289 is an apocalyptic number.

It is an amenable number.

1311334289 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311334289 is an equidigital number, since it uses as much as digits as its factorization.

1311334289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15552, while the sum is 35.

The square root of 1311334289 is about 36212.3499513633. The cubic root of 1311334289 is about 1094.5555458729. Note that the first 4 decimals are identical.

The spelling of 1311334289 in words is "one billion, three hundred eleven million, three hundred thirty-four thousand, two hundred eighty-nine".