1311309959 has 2 divisors, whose sum is σ = 1311309960. Its totient is φ = 1311309958.

The previous prime is 1311309919. The next prime is 1311310031. The reversal of 1311309959 is 9599031131.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1311309959 - 2¹⁶ = 1311244423 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1311309919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655654979 + 655654980.

It is an arithmetic number, because the mean of its divisors is an integer number (655654980).

Almost surely, 2^1311309959 is an apocalyptic number.

1311309959 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311309959 is an equidigital number, since it uses as much as digits as its factorization.

1311309959 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32805, while the sum is 41.

The square root of 1311309959 is about 36212.0140146886. The cubic root of 1311309959 is about 1094.5487765079.

The spelling of 1311309959 in words is "one billion, three hundred eleven million, three hundred nine thousand, nine hundred fifty-nine".