311211308977 has 2 divisors, whose sum is σ = 311211308978. Its totient is φ = 311211308976.

The previous prime is 311211308959. The next prime is 311211309089. The reversal of 311211308977 is 779803112113.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 182359745296 + 128851563681 = 427036^2 + 358959^2 .

It is a cyclic number.

It is not a de Polignac number, because 311211308977 - 2³⁵ = 276851570609 is a prime.

It is not a weakly prime, because it can be changed into another prime (311211308927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155605654488 + 155605654489.

It is an arithmetic number, because the mean of its divisors is an integer number (155605654489).

Almost surely, 2^311211308977 is an apocalyptic number.

It is an amenable number.

311211308977 is a deficient number, since it is larger than the sum of its proper divisors (1).

311211308977 is an equidigital number, since it uses as much as digits as its factorization.

311211308977 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 63504, while the sum is 43.

The spelling of 311211308977 in words is "three hundred eleven billion, two hundred eleven million, three hundred eight thousand, nine hundred seventy-seven".