311711047 has 2 divisors, whose sum is σ = 311711048. Its totient is φ = 311711046.

The previous prime is 311711041. The next prime is 311711089. The reversal of 311711047 is 740117113.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 311711047 - 2³ = 311711039 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (311711041) 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, 155855523 + 155855524.

It is an arithmetic number, because the mean of its divisors is an integer number (155855524).

Almost surely, 2^311711047 is an apocalyptic number.

311711047 is a deficient number, since it is larger than the sum of its proper divisors (1).

311711047 is an equidigital number, since it uses as much as digits as its factorization.

311711047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 588, while the sum is 25.

The square root of 311711047 is about 17655.3404668389. The cubic root of 311711047 is about 678.0328434359.

The spelling of 311711047 in words is "three hundred eleven million, seven hundred eleven thousand, forty-seven".