128323 has 4 divisors (see below), whose sum is σ = 138208. Its totient is φ = 118440.

The previous prime is 128321. The next prime is 128327. The reversal of 128323 is 323821.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 323821 = 79 ⋅4099.

It is a cyclic number.

It is not a de Polignac number, because 128323 - 2¹ = 128321 is a prime.

It is a Duffinian number.

128323 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 128323.

It is not an unprimeable number, because it can be changed into a prime (128321) 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, 4923 + ... + 4948.

It is an arithmetic number, because the mean of its divisors is an integer number (34552).

2¹²⁸³²³ is an apocalyptic number.

128323 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

128323 is a deficient number, since it is larger than the sum of its proper divisors (9885).

128323 is an equidigital number, since it uses as much as digits as its factorization.

128323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9884.

The product of its digits is 288, while the sum is 19.

The square root of 128323 is about 358.2219982078. The cubic root of 128323 is about 50.4391974823.

The spelling of 128323 in words is "one hundred twenty-eight thousand, three hundred twenty-three".