128499017 has 2 divisors, whose sum is σ = 128499018. Its totient is φ = 128499016.

The previous prime is 128498983. The next prime is 128499047. The reversal of 128499017 is 710994821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 87909376 + 40589641 = 9376^2 + 6371^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128499017 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (128499047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64249508 + 64249509.

It is an arithmetic number, because the mean of its divisors is an integer number (64249509).

Almost surely, 2^128499017 is an apocalyptic number.

It is an amenable number.

128499017 is a deficient number, since it is larger than the sum of its proper divisors (1).

128499017 is an equidigital number, since it uses as much as digits as its factorization.

128499017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288, while the sum is 41.

The square root of 128499017 is about 11335.7406904004. The cubic root of 128499017 is about 504.6224894877.

The spelling of 128499017 in words is "one hundred twenty-eight million, four hundred ninety-nine thousand, seventeen".