312934217 has 2 divisors, whose sum is σ = 312934218. Its totient is φ = 312934216.

The previous prime is 312934213. The next prime is 312934229. The reversal of 312934217 is 712439213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 179854921 + 133079296 = 13411^2 + 11536^2 .

It is a cyclic number.

It is not a de Polignac number, because 312934217 - 2² = 312934213 is a prime.

It is not a weakly prime, because it can be changed into another prime (312934211) 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, 156467108 + 156467109.

It is an arithmetic number, because the mean of its divisors is an integer number (156467109).

Almost surely, 2^312934217 is an apocalyptic number.

It is an amenable number.

312934217 is a deficient number, since it is larger than the sum of its proper divisors (1).

312934217 is an equidigital number, since it uses as much as digits as its factorization.

312934217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9072, while the sum is 32.

The square root of 312934217 is about 17689.9467777605. The cubic root of 312934217 is about 678.9185643588.

The spelling of 312934217 in words is "three hundred twelve million, nine hundred thirty-four thousand, two hundred seventeen".