128840203 has 4 divisors (see below), whose sum is σ = 129823848. Its totient is φ = 127856560.

The previous prime is 128840183. The next prime is 128840213. The reversal of 128840203 is 302048821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 302048821 = 211 ⋅1431511.

It is a cyclic number.

It is not a de Polignac number, because 128840203 - 2⁵ = 128840171 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128840213) 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, 491626 + ... + 491887.

It is an arithmetic number, because the mean of its divisors is an integer number (32455962).

Almost surely, 2^128840203 is an apocalyptic number.

128840203 is a deficient number, since it is larger than the sum of its proper divisors (983645).

128840203 is an equidigital number, since it uses as much as digits as its factorization.

128840203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 983644.

The product of its (nonzero) digits is 3072, while the sum is 28.

The square root of 128840203 is about 11350.7798410506. The cubic root of 128840203 is about 505.0687133243.

The spelling of 128840203 in words is "one hundred twenty-eight million, eight hundred forty thousand, two hundred three".