311549977 has 2 divisors, whose sum is σ = 311549978. Its totient is φ = 311549976.

The previous prime is 311549951. The next prime is 311549983. The reversal of 311549977 is 779945113.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 205377561 + 106172416 = 14331^2 + 10304^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-311549977 is a prime.

It is not a weakly prime, because it can be changed into another prime (311549947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155774988 + 155774989.

It is an arithmetic number, because the mean of its divisors is an integer number (155774989).

Almost surely, 2^311549977 is an apocalyptic number.

It is an amenable number.

311549977 is a deficient number, since it is larger than the sum of its proper divisors (1).

311549977 is an equidigital number, since it uses as much as digits as its factorization.

311549977 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 238140, while the sum is 46.

The square root of 311549977 is about 17650.7783681060. The cubic root of 311549977 is about 677.9160370032.

The spelling of 311549977 in words is "three hundred eleven million, five hundred forty-nine thousand, nine hundred seventy-seven".