1311597871 has 2 divisors, whose sum is σ = 1311597872. Its totient is φ = 1311597870.

The previous prime is 1311597869. The next prime is 1311597899. The reversal of 1311597871 is 1787951131.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1311597871 - 2¹ = 1311597869 is a prime.

Together with 1311597869, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1311597071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655798935 + 655798936.

It is an arithmetic number, because the mean of its divisors is an integer number (655798936).

Almost surely, 2^1311597871 is an apocalyptic number.

1311597871 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311597871 is an equidigital number, since it uses as much as digits as its factorization.

1311597871 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 52920, while the sum is 43.

The square root of 1311597871 is about 36215.9891622471. The cubic root of 1311597871 is about 1094.6288772409.

The spelling of 1311597871 in words is "one billion, three hundred eleven million, five hundred ninety-seven thousand, eight hundred seventy-one".