2128946317 has 2 divisors, whose sum is σ = 2128946318. Its totient is φ = 2128946316.

The previous prime is 2128946269. The next prime is 2128946381. The reversal of 2128946317 is 7136498212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2045662441 + 83283876 = 45229^2 + 9126^2 .

It is a cyclic number.

It is not a de Polignac number, because 2128946317 - 2¹¹ = 2128944269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2128946117) 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, 1064473158 + 1064473159.

It is an arithmetic number, because the mean of its divisors is an integer number (1064473159).

Almost surely, 2^2128946317 is an apocalyptic number.

It is an amenable number.

2128946317 is a deficient number, since it is larger than the sum of its proper divisors (1).

2128946317 is an equidigital number, since it uses as much as digits as its factorization.

2128946317 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145152, while the sum is 43.

The square root of 2128946317 is about 46140.5062499318. The cubic root of 2128946317 is about 1286.4361535542.

The spelling of 2128946317 in words is "two billion, one hundred twenty-eight million, nine hundred forty-six thousand, three hundred seventeen".