128301289 has 2 divisors, whose sum is σ = 128301290. Its totient is φ = 128301288.

The previous prime is 128301247. The next prime is 128301323. The reversal of 128301289 is 982103821.

It is an a-pointer prime, because the next prime (128301323) can be obtained adding 128301289 to its sum of digits (34).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 119180889 + 9120400 = 10917^2 + 3020^2 .

It is a cyclic number.

It is not a de Polignac number, because 128301289 - 2⁷ = 128301161 is a prime.

It is a super-2 number, since 2×128301289² = 32922441518123042, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (128301389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64150644 + 64150645.

It is an arithmetic number, because the mean of its divisors is an integer number (64150645).

Almost surely, 2^128301289 is an apocalyptic number.

It is an amenable number.

128301289 is a deficient number, since it is larger than the sum of its proper divisors (1).

128301289 is an equidigital number, since it uses as much as digits as its factorization.

128301289 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 34.

The square root of 128301289 is about 11327.0158912222. The cubic root of 128301289 is about 504.3635271507.

The spelling of 128301289 in words is "one hundred twenty-eight million, three hundred one thousand, two hundred eighty-nine".