128397233 has 2 divisors, whose sum is σ = 128397234. Its totient is φ = 128397232.

The previous prime is 128397229. The next prime is 128397331. The reversal of 128397233 is 332793821.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 95023504 + 33373729 = 9748^2 + 5777^2 .

It is a cyclic number.

It is not a de Polignac number, because 128397233 - 2² = 128397229 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (128397223) 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, 64198616 + 64198617.

It is an arithmetic number, because the mean of its divisors is an integer number (64198617).

Almost surely, 2^128397233 is an apocalyptic number.

It is an amenable number.

128397233 is a deficient number, since it is larger than the sum of its proper divisors (1).

128397233 is an equidigital number, since it uses as much as digits as its factorization.

128397233 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54432, while the sum is 38.

The square root of 128397233 is about 11331.2502840596. The cubic root of 128397233 is about 504.4892172287.

The spelling of 128397233 in words is "one hundred twenty-eight million, three hundred ninety-seven thousand, two hundred thirty-three".