128268697 has 2 divisors, whose sum is σ = 128268698. Its totient is φ = 128268696.

The previous prime is 128268691. The next prime is 128268703. The reversal of 128268697 is 796862821.

It is a balanced prime because it is at equal distance from previous prime (128268691) and next prime (128268703).

It can be written as a sum of positive squares in only one way, i.e., 128232976 + 35721 = 11324^2 + 189^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128268697 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 128268697.

It is not a weakly prime, because it can be changed into another prime (128268691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64134348 + 64134349.

It is an arithmetic number, because the mean of its divisors is an integer number (64134349).

Almost surely, 2^128268697 is an apocalyptic number.

It is an amenable number.

128268697 is a deficient number, since it is larger than the sum of its proper divisors (1).

128268697 is an equidigital number, since it uses as much as digits as its factorization.

128268697 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 580608, while the sum is 49.

The square root of 128268697 is about 11325.5771155381. The cubic root of 128268697 is about 504.3208162049.

The spelling of 128268697 in words is "one hundred twenty-eight million, two hundred sixty-eight thousand, six hundred ninety-seven".