311688831677 has 2 divisors, whose sum is σ = 311688831678. Its totient is φ = 311688831676.

The previous prime is 311688831637. The next prime is 311688831691. The reversal of 311688831677 is 776138886113.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 187583405881 + 124105425796 = 433109^2 + 352286^2 .

It is an emirp because it is prime and its reverse (776138886113) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 311688831677 - 2¹⁰ = 311688830653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (311688831617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155844415838 + 155844415839.

It is an arithmetic number, because the mean of its divisors is an integer number (155844415839).

Almost surely, 2^311688831677 is an apocalyptic number.

It is an amenable number.

311688831677 is a deficient number, since it is larger than the sum of its proper divisors (1).

311688831677 is an equidigital number, since it uses as much as digits as its factorization.

311688831677 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8128512, while the sum is 59.

The spelling of 311688831677 in words is "three hundred eleven billion, six hundred eighty-eight million, eight hundred thirty-one thousand, six hundred seventy-seven".