3128000009 has 2 divisors, whose sum is σ = 3128000010. Its totient is φ = 3128000008.

The previous prime is 3127999993. The next prime is 3128000011. The reversal of 3128000009 is 9000008213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3127605625 + 394384 = 55925^2 + 628^2 .

It is a cyclic number.

It is not a de Polignac number, because 3128000009 - 2⁴ = 3127999993 is a prime.

It is a Sophie Germain prime.

Together with 3128000011, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (3128000509) 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, 1564000004 + 1564000005.

It is an arithmetic number, because the mean of its divisors is an integer number (1564000005).

Almost surely, 2^3128000009 is an apocalyptic number.

It is an amenable number.

3128000009 is a deficient number, since it is larger than the sum of its proper divisors (1).

3128000009 is an equidigital number, since it uses as much as digits as its factorization.

3128000009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 3128000009 is about 55928.5258968981. The cubic root of 3128000009 is about 1462.4765637173.

The spelling of 3128000009 in words is "three billion, one hundred twenty-eight million, nine", and thus it is an aban number.