311349977 has 2 divisors, whose sum is σ = 311349978. Its totient is φ = 311349976.

The previous prime is 311349959. The next prime is 311349989. The reversal of 311349977 is 779943113.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 246772681 + 64577296 = 15709^2 + 8036^2 .

It is an emirp because it is prime and its reverse (779943113) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 311349977 - 2⁸ = 311349721 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (311349277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155674988 + 155674989.

It is an arithmetic number, because the mean of its divisors is an integer number (155674989).

Almost surely, 2^311349977 is an apocalyptic number.

It is an amenable number.

311349977 is a deficient number, since it is larger than the sum of its proper divisors (1).

311349977 is an equidigital number, since it uses as much as digits as its factorization.

311349977 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 142884, while the sum is 44.

The square root of 311349977 is about 17645.1119860430. Note that the first 3 decimals coincide. The cubic root of 311349977 is about 677.7709428606.

The spelling of 311349977 in words is "three hundred eleven million, three hundred forty-nine thousand, nine hundred seventy-seven".