128663593 has 2 divisors, whose sum is σ = 128663594. Its totient is φ = 128663592.

The previous prime is 128663551. The next prime is 128663603. The reversal of 128663593 is 395366821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 123032464 + 5631129 = 11092^2 + 2373^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128663593 is a prime.

It is not a weakly prime, because it can be changed into another prime (128663503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64331796 + 64331797.

It is an arithmetic number, because the mean of its divisors is an integer number (64331797).

Almost surely, 2^128663593 is an apocalyptic number.

It is an amenable number.

128663593 is a deficient number, since it is larger than the sum of its proper divisors (1).

128663593 is an equidigital number, since it uses as much as digits as its factorization.

128663593 is an evil number, because the sum of its binary digits is even.

The product of its digits is 233280, while the sum is 43.

The square root of 128663593 is about 11342.9975315170. The cubic root of 128663593 is about 504.8378304890.

The spelling of 128663593 in words is "one hundred twenty-eight million, six hundred sixty-three thousand, five hundred ninety-three".