128958017 has 2 divisors, whose sum is σ = 128958018. Its totient is φ = 128958016.

The previous prime is 128957993. The next prime is 128958023. The reversal of 128958017 is 710859821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 121903681 + 7054336 = 11041^2 + 2656^2 .

It is a cyclic number.

It is not a de Polignac number, because 128958017 - 2⁶ = 128957953 is a prime.

It is a super-3 number, since 3×128958017³ (a number of 25 digits) contains 333 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (128955017) 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, 64479008 + 64479009.

It is an arithmetic number, because the mean of its divisors is an integer number (64479009).

Almost surely, 2^128958017 is an apocalyptic number.

It is an amenable number.

128958017 is a deficient number, since it is larger than the sum of its proper divisors (1).

128958017 is an equidigital number, since it uses as much as digits as its factorization.

128958017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40320, while the sum is 41.

The square root of 128958017 is about 11355.9683426822. The cubic root of 128958017 is about 505.2226146583. Note that the first 3 decimals are identical.

The spelling of 128958017 in words is "one hundred twenty-eight million, nine hundred fifty-eight thousand, seventeen".