128893 has 4 divisors (see below), whose sum is σ = 131068. Its totient is φ = 126720.

The previous prime is 128879. The next prime is 128903. The reversal of 128893 is 398821.

128893 is nontrivially palindromic in base 4.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1444 + 127449 = 38^2 + 357^2 .

It is a cyclic number.

It is not a de Polignac number, because 128893 - 2⁵ = 128861 is a prime.

It is a super-2 number, since 2×128893² = 33226810898, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128813) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 996 + ... + 1117.

It is an arithmetic number, because the mean of its divisors is an integer number (32767).

2¹²⁸⁸⁹³ is an apocalyptic number.

It is an amenable number.

128893 is a deficient number, since it is larger than the sum of its proper divisors (2175).

128893 is an equidigital number, since it uses as much as digits as its factorization.

128893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2174.

The product of its digits is 3456, while the sum is 31.

The square root of 128893 is about 359.0167127029. The cubic root of 128893 is about 50.5137694048.

The spelling of 128893 in words is "one hundred twenty-eight thousand, eight hundred ninety-three".