128693 has 2 divisors, whose sum is σ = 128694. Its totient is φ = 128692.

The previous prime is 128683. The next prime is 128717. The reversal of 128693 is 396821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 128164 + 529 = 358^2 + 23^2 .

It is a cyclic number.

It is not a de Polignac number, because 128693 - 2⁴ = 128677 is a prime.

It is a nialpdrome in base 11.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64346 + 64347.

It is an arithmetic number, because the mean of its divisors is an integer number (64347).

2¹²⁸⁶⁹³ is an apocalyptic number.

It is an amenable number.

128693 is a deficient number, since it is larger than the sum of its proper divisors (1).

128693 is an equidigital number, since it uses as much as digits as its factorization.

128693 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2592, while the sum is 29.

The square root of 128693 is about 358.7380660036. The cubic root of 128693 is about 50.4876289012.

The spelling of 128693 in words is "one hundred twenty-eight thousand, six hundred ninety-three".