128280497 has 2 divisors, whose sum is σ = 128280498. Its totient is φ = 128280496.

The previous prime is 128280479. The next prime is 128280539. The reversal of 128280497 is 794082821.

Together with previous prime (128280479) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 123632161 + 4648336 = 11119^2 + 2156^2 .

It is a cyclic number.

It is not a de Polignac number, because 128280497 - 2⁸ = 128280241 is a prime.

It is not a weakly prime, because it can be changed into another prime (128280797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64140248 + 64140249.

It is an arithmetic number, because the mean of its divisors is an integer number (64140249).

Almost surely, 2^128280497 is an apocalyptic number.

It is an amenable number.

128280497 is a deficient number, since it is larger than the sum of its proper divisors (1).

128280497 is an equidigital number, since it uses as much as digits as its factorization.

128280497 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64512, while the sum is 41.

The square root of 128280497 is about 11326.0980483130. The cubic root of 128280497 is about 504.3362806253.

The spelling of 128280497 in words is "one hundred twenty-eight million, two hundred eighty thousand, four hundred ninety-seven".