311277457949 has 2 divisors, whose sum is σ = 311277457950. Its totient is φ = 311277457948.

The previous prime is 311277457927. The next prime is 311277457999. The reversal of 311277457949 is 949754772113.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 301970032324 + 9307425625 = 549518^2 + 96475^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-311277457949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (311277457999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155638728974 + 155638728975.

It is an arithmetic number, because the mean of its divisors is an integer number (155638728975).

Almost surely, 2^311277457949 is an apocalyptic number.

It is an amenable number.

311277457949 is a deficient number, since it is larger than the sum of its proper divisors (1).

311277457949 is an equidigital number, since it uses as much as digits as its factorization.

311277457949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13335840, while the sum is 59.

The spelling of 311277457949 in words is "three hundred eleven billion, two hundred seventy-seven million, four hundred fifty-seven thousand, nine hundred forty-nine".