128363 has 4 divisors (see below), whose sum is σ = 133968. Its totient is φ = 122760.

The previous prime is 128351. The next prime is 128377. The reversal of 128363 is 363821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 363821 = 37 ⋅9833.

It is a cyclic number.

It is not a de Polignac number, because 128363 - 2⁴ = 128347 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23), and also a Moran number because the ratio is a prime number: 5581 = 128363 / (1 + 2 + 8 + 3 + 6 + 3).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128393) 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, 2768 + ... + 2813.

It is an arithmetic number, because the mean of its divisors is an integer number (33492).

2¹²⁸³⁶³ is an apocalyptic number.

128363 is a deficient number, since it is larger than the sum of its proper divisors (5605).

128363 is an equidigital number, since it uses as much as digits as its factorization.

128363 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5604.

The product of its digits is 864, while the sum is 23.

The square root of 128363 is about 358.2778251581. The cubic root of 128363 is about 50.4444377959. Note that the first 4 decimals are identical.

It can be divided in two parts, 128 and 363, that multiplied together give a palindrome (46464).

The spelling of 128363 in words is "one hundred twenty-eight thousand, three hundred sixty-three".