311139317 has 2 divisors, whose sum is σ = 311139318. Its totient is φ = 311139316.

The previous prime is 311139277. The next prime is 311139329. The reversal of 311139317 is 713931113.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 174927076 + 136212241 = 13226^2 + 11671^2 .

It is a cyclic number.

It is not a de Polignac number, because 311139317 - 2¹⁰ = 311138293 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 311139317.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (314139317) 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, 155569658 + 155569659.

It is an arithmetic number, because the mean of its divisors is an integer number (155569659).

Almost surely, 2^311139317 is an apocalyptic number.

It is an amenable number.

311139317 is a deficient number, since it is larger than the sum of its proper divisors (1).

311139317 is an equidigital number, since it uses as much as digits as its factorization.

311139317 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1701, while the sum is 29.

The square root of 311139317 is about 17639.1416174371. The cubic root of 311139317 is about 677.6180479930.

The spelling of 311139317 in words is "three hundred eleven million, one hundred thirty-nine thousand, three hundred seventeen".