128210297 has 2 divisors, whose sum is σ = 128210298. Its totient is φ = 128210296.

The previous prime is 128210287. The next prime is 128210317. The reversal of 128210297 is 792012821.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 94848121 + 33362176 = 9739^2 + 5776^2 .

It is a cyclic number.

It is not a de Polignac number, because 128210297 - 2¹⁸ = 127948153 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (128210267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64105148 + 64105149.

It is an arithmetic number, because the mean of its divisors is an integer number (64105149).

Almost surely, 2^128210297 is an apocalyptic number.

It is an amenable number.

128210297 is a deficient number, since it is larger than the sum of its proper divisors (1).

128210297 is an equidigital number, since it uses as much as digits as its factorization.

128210297 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 32.

The square root of 128210297 is about 11322.9985869468. The cubic root of 128210297 is about 504.2442664639.

Adding to 128210297 its sum of digits (32), we get a square (128210329 = 11323²).

The spelling of 128210297 in words is "one hundred twenty-eight million, two hundred ten thousand, two hundred ninety-seven".