2128283809 has 2 divisors, whose sum is σ = 2128283810. Its totient is φ = 2128283808.

The previous prime is 2128283713. The next prime is 2128283819. The reversal of 2128283809 is 9083828212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1428840000 + 699443809 = 37800^2 + 26447^2 .

It is a cyclic number.

It is not a de Polignac number, because 2128283809 - 2⁷ = 2128283681 is a prime.

It is not a weakly prime, because it can be changed into another prime (2128283819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1064141904 + 1064141905.

It is an arithmetic number, because the mean of its divisors is an integer number (1064141905).

Almost surely, 2^2128283809 is an apocalyptic number.

It is an amenable number.

2128283809 is a deficient number, since it is larger than the sum of its proper divisors (1).

2128283809 is an equidigital number, since it uses as much as digits as its factorization.

2128283809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 110592, while the sum is 43.

The square root of 2128283809 is about 46133.3264462904. The cubic root of 2128283809 is about 1286.3026974468.

The spelling of 2128283809 in words is "two billion, one hundred twenty-eight million, two hundred eighty-three thousand, eight hundred nine".