128775233 has 2 divisors, whose sum is σ = 128775234. Its totient is φ = 128775232.

The previous prime is 128775191. The next prime is 128775307. The reversal of 128775233 is 332577821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 89737729 + 39037504 = 9473^2 + 6248^2 .

It is a cyclic number.

It is not a de Polignac number, because 128775233 - 2⁶ = 128775169 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (128771233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64387616 + 64387617.

It is an arithmetic number, because the mean of its divisors is an integer number (64387617).

Almost surely, 2^128775233 is an apocalyptic number.

It is an amenable number.

128775233 is a deficient number, since it is larger than the sum of its proper divisors (1).

128775233 is an equidigital number, since it uses as much as digits as its factorization.

128775233 is an evil number, because the sum of its binary digits is even.

The product of its digits is 70560, while the sum is 38.

The square root of 128775233 is about 11347.9175622667. The cubic root of 128775233 is about 504.9838023756.

The spelling of 128775233 in words is "one hundred twenty-eight million, seven hundred seventy-five thousand, two hundred thirty-three".