128067617 has 2 divisors, whose sum is σ = 128067618. Its totient is φ = 128067616.

The previous prime is 128067607. The next prime is 128067629. The reversal of 128067617 is 716760821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 100020001 + 28047616 = 10001^2 + 5296^2 .

It is a cyclic number.

It is not a de Polignac number, because 128067617 - 2¹⁶ = 128002081 is a prime.

It is not a weakly prime, because it can be changed into another prime (128067607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64033808 + 64033809.

It is an arithmetic number, because the mean of its divisors is an integer number (64033809).

Almost surely, 2^128067617 is an apocalyptic number.

It is an amenable number.

128067617 is a deficient number, since it is larger than the sum of its proper divisors (1).

128067617 is an equidigital number, since it uses as much as digits as its factorization.

128067617 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28224, while the sum is 38.

The square root of 128067617 is about 11316.6963818952. The cubic root of 128067617 is about 504.0571460881.

The spelling of 128067617 in words is "one hundred twenty-eight million, sixty-seven thousand, six hundred seventeen".