7128009907 has 2 divisors, whose sum is σ = 7128009908. Its totient is φ = 7128009906.

The previous prime is 7128009901. The next prime is 7128009991. The reversal of 7128009907 is 7099008217.

It is a happy number.

7128009907 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 7128009907 - 2³ = 7128009899 is a prime.

It is not a weakly prime, because it can be changed into another prime (7128009901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3564004953 + 3564004954.

It is an arithmetic number, because the mean of its divisors is an integer number (3564004954).

Almost surely, 2^7128009907 is an apocalyptic number.

7128009907 is a deficient number, since it is larger than the sum of its proper divisors (1).

7128009907 is an equidigital number, since it uses as much as digits as its factorization.

7128009907 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 63504, while the sum is 43.

The square root of 7128009907 is about 84427.5423484540. The cubic root of 7128009907 is about 1924.5214896088.

The spelling of 7128009907 in words is "seven billion, one hundred twenty-eight million, nine thousand, nine hundred seven".