128135233 has 2 divisors, whose sum is σ = 128135234. Its totient is φ = 128135232.

The previous prime is 128135219. The next prime is 128135237. The reversal of 128135233 is 332531821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 127961344 + 173889 = 11312^2 + 417^2 .

It is an emirp because it is prime and its reverse (332531821) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128135233 is a prime.

It is not a weakly prime, because it can be changed into another prime (128135237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64067616 + 64067617.

It is an arithmetic number, because the mean of its divisors is an integer number (64067617).

Almost surely, 2^128135233 is an apocalyptic number.

It is an amenable number.

128135233 is a deficient number, since it is larger than the sum of its proper divisors (1).

128135233 is an equidigital number, since it uses as much as digits as its factorization.

128135233 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4320, while the sum is 28.

The square root of 128135233 is about 11319.6834319693. The cubic root of 128135233 is about 504.1458396818.

The spelling of 128135233 in words is "one hundred twenty-eight million, one hundred thirty-five thousand, two hundred thirty-three".