311996317 has 2 divisors, whose sum is σ = 311996318. Its totient is φ = 311996316.

The previous prime is 311996299. The next prime is 311996339. The reversal of 311996317 is 713699113.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 310957956 + 1038361 = 17634^2 + 1019^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-311996317 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 311996317.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (311996117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155998158 + 155998159.

It is an arithmetic number, because the mean of its divisors is an integer number (155998159).

Almost surely, 2^311996317 is an apocalyptic number.

It is an amenable number.

311996317 is a deficient number, since it is larger than the sum of its proper divisors (1).

311996317 is an equidigital number, since it uses as much as digits as its factorization.

311996317 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30618, while the sum is 40.

The square root of 311996317 is about 17663.4174779401. The cubic root of 311996317 is about 678.2396198249.

The spelling of 311996317 in words is "three hundred eleven million, nine hundred ninety-six thousand, three hundred seventeen".