128330717 has 2 divisors, whose sum is σ = 128330718. Its totient is φ = 128330716.

The previous prime is 128330707. The next prime is 128330743. The reversal of 128330717 is 717033821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 128278276 + 52441 = 11326^2 + 229^2 .

It is a cyclic number.

It is not a de Polignac number, because 128330717 - 2²⁴ = 111553501 is a prime.

It is a Chen prime.

It is equal to p_7288700 and since 128330717 and 7288700 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128330707) 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, 64165358 + 64165359.

It is an arithmetic number, because the mean of its divisors is an integer number (64165359).

Almost surely, 2^128330717 is an apocalyptic number.

It is an amenable number.

128330717 is a deficient number, since it is larger than the sum of its proper divisors (1).

128330717 is an equidigital number, since it uses as much as digits as its factorization.

128330717 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7056, while the sum is 32.

The square root of 128330717 is about 11328.3148349611. The cubic root of 128330717 is about 504.4020855455.

The spelling of 128330717 in words is "one hundred twenty-eight million, three hundred thirty thousand, seven hundred seventeen".