311724349 has 2 divisors, whose sum is σ = 311724350. Its totient is φ = 311724348.

The previous prime is 311724311. The next prime is 311724373. The reversal of 311724349 is 943427113.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 311275449 + 448900 = 17643^2 + 670^2 .

It is an emirp because it is prime and its reverse (943427113) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 311724349 - 2¹⁵ = 311691581 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (311724379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155862174 + 155862175.

It is an arithmetic number, because the mean of its divisors is an integer number (155862175).

Almost surely, 2^311724349 is an apocalyptic number.

It is an amenable number.

311724349 is a deficient number, since it is larger than the sum of its proper divisors (1).

311724349 is an equidigital number, since it uses as much as digits as its factorization.

311724349 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18144, while the sum is 34.

The square root of 311724349 is about 17655.7171760311. The cubic root of 311724349 is about 678.0424881209.

The spelling of 311724349 in words is "three hundred eleven million, seven hundred twenty-four thousand, three hundred forty-nine".