312143317 has 2 divisors, whose sum is σ = 312143318. Its totient is φ = 312143316.

The previous prime is 312143311. The next prime is 312143333. The reversal of 312143317 is 713341213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 289476196 + 22667121 = 17014^2 + 4761^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-312143317 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 312143291 and 312143300.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312143311) 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, 156071658 + 156071659.

It is an arithmetic number, because the mean of its divisors is an integer number (156071659).

Almost surely, 2^312143317 is an apocalyptic number.

It is an amenable number.

312143317 is a deficient number, since it is larger than the sum of its proper divisors (1).

312143317 is an equidigital number, since it uses as much as digits as its factorization.

312143317 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1512, while the sum is 25.

The square root of 312143317 is about 17667.5781305758. The cubic root of 312143317 is about 678.3461227592.

The spelling of 312143317 in words is "three hundred twelve million, one hundred forty-three thousand, three hundred seventeen".