1311131723977 has 2 divisors, whose sum is σ = 1311131723978. Its totient is φ = 1311131723976.

The previous prime is 1311131723897. The next prime is 1311131723983. The reversal of 1311131723977 is 7793271311131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1037497067776 + 273634656201 = 1018576^2 + 523101^2 .

It is a cyclic number.

It is not a de Polignac number, because 1311131723977 - 2⁷ = 1311131723849 is a prime.

It is not a weakly prime, because it can be changed into another prime (1311131723477) 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, 655565861988 + 655565861989.

It is an arithmetic number, because the mean of its divisors is an integer number (655565861989).

Almost surely, 2^{1311131723977} is an apocalyptic number.

It is an amenable number.

1311131723977 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311131723977 is an equidigital number, since it uses as much as digits as its factorization.

1311131723977 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 166698, while the sum is 46.

The spelling of 1311131723977 in words is "one trillion, three hundred eleven billion, one hundred thirty-one million, seven hundred twenty-three thousand, nine hundred seventy-seven".