9128129 has 2 divisors, whose sum is σ = 9128130. Its totient is φ = 9128128.

The previous prime is 9128123. The next prime is 9128131. The reversal of 9128129 is 9218219.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7507600 + 1620529 = 2740^2 + 1273^2 .

It is a cyclic number.

It is not a de Polignac number, because 9128129 - 2⁸ = 9127873 is a prime.

Together with 9128131, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 9128095 and 9128104.

It is not a weakly prime, because it can be changed into another prime (9128123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4564064 + 4564065.

It is an arithmetic number, because the mean of its divisors is an integer number (4564065).

Almost surely, 2^9128129 is an apocalyptic number.

It is an amenable number.

9128129 is a deficient number, since it is larger than the sum of its proper divisors (1).

9128129 is an equidigital number, since it uses as much as digits as its factorization.

9128129 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2592, while the sum is 32.

The square root of 9128129 is about 3021.2793647725. The cubic root of 9128129 is about 208.9908422992.

The spelling of 9128129 in words is "nine million, one hundred twenty-eight thousand, one hundred twenty-nine".