1311165983 has 2 divisors, whose sum is σ = 1311165984. Its totient is φ = 1311165982.

The previous prime is 1311165979. The next prime is 1311166033. The reversal of 1311165983 is 3895611131.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1311165983 - 2² = 1311165979 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1311167983) 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, 655582991 + 655582992.

It is an arithmetic number, because the mean of its divisors is an integer number (655582992).

Almost surely, 2^1311165983 is an apocalyptic number.

1311165983 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311165983 is an equidigital number, since it uses as much as digits as its factorization.

1311165983 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19440, while the sum is 38.

The square root of 1311165983 is about 36210.0260010953. The cubic root of 1311165983 is about 1094.5087161796.

The spelling of 1311165983 in words is "one billion, three hundred eleven million, one hundred sixty-five thousand, nine hundred eighty-three".