1311113977 has 2 divisors, whose sum is σ = 1311113978. Its totient is φ = 1311113976.

The previous prime is 1311113971. The next prime is 1311114029. The reversal of 1311113977 is 7793111131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1045293561 + 265820416 = 32331^2 + 16304^2 .

It is a cyclic number.

It is not a de Polignac number, because 1311113977 - 2⁷ = 1311113849 is a prime.

It is not a weakly prime, because it can be changed into another prime (1311113971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655556988 + 655556989.

It is an arithmetic number, because the mean of its divisors is an integer number (655556989).

Almost surely, 2^1311113977 is an apocalyptic number.

It is an amenable number.

1311113977 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311113977 is an equidigital number, since it uses as much as digits as its factorization.

1311113977 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3969, while the sum is 34.

The square root of 1311113977 is about 36209.3078779476. The cubic root of 1311113977 is about 1094.4942451480.

The spelling of 1311113977 in words is "one billion, three hundred eleven million, one hundred thirteen thousand, nine hundred seventy-seven".