311043449 has 2 divisors, whose sum is σ = 311043450. Its totient is φ = 311043448.

The previous prime is 311043431. The next prime is 311043451. The reversal of 311043449 is 944340113.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 310887424 + 156025 = 17632^2 + 395^2 .

It is a cyclic number.

It is not a de Polignac number, because 311043449 - 2¹⁶ = 310977913 is a prime.

Together with 311043451, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (311043409) 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, 155521724 + 155521725.

It is an arithmetic number, because the mean of its divisors is an integer number (155521725).

Almost surely, 2^311043449 is an apocalyptic number.

It is an amenable number.

311043449 is a deficient number, since it is larger than the sum of its proper divisors (1).

311043449 is an equidigital number, since it uses as much as digits as its factorization.

311043449 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 311043449 is about 17636.4239289035. The cubic root of 311043449 is about 677.5484451317.

The spelling of 311043449 in words is "three hundred eleven million, forty-three thousand, four hundred forty-nine".