128393 has 2 divisors, whose sum is σ = 128394. Its totient is φ = 128392.

The previous prime is 128389. The next prime is 128399. The reversal of 128393 is 393821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 123904 + 4489 = 352^2 + 67^2 .

It is a cyclic number.

It is not a de Polignac number, because 128393 - 2² = 128389 is a prime.

It is a Chen prime.

It is a nialpdrome in base 11.

It is not a weakly prime, because it can be changed into another prime (128399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64196 + 64197.

It is an arithmetic number, because the mean of its divisors is an integer number (64197).

2¹²⁸³⁹³ is an apocalyptic number.

It is an amenable number.

128393 is a deficient number, since it is larger than the sum of its proper divisors (1).

128393 is an equidigital number, since it uses as much as digits as its factorization.

128393 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1296, while the sum is 26.

The square root of 128393 is about 358.3196896627. The cubic root of 128393 is about 50.4483673168.

The spelling of 128393 in words is "one hundred twenty-eight thousand, three hundred ninety-three".