128645183 has 4 divisors (see below), whose sum is σ = 129971520. Its totient is φ = 127318848.

The previous prime is 128645177. The next prime is 128645197. The reversal of 128645183 is 381546821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 381546821 = 227 ⋅1680823.

It is a cyclic number.

It is not a de Polignac number, because 128645183 - 2⁶ = 128645119 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128645123) 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, 663023 + ... + 663216.

It is an arithmetic number, because the mean of its divisors is an integer number (32492880).

Almost surely, 2^128645183 is an apocalyptic number.

128645183 is a deficient number, since it is larger than the sum of its proper divisors (1326337).

128645183 is an equidigital number, since it uses as much as digits as its factorization.

128645183 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1326336.

The product of its digits is 46080, while the sum is 38.

The square root of 128645183 is about 11342.1859886003. The cubic root of 128645183 is about 504.8137508781.

The spelling of 128645183 in words is "one hundred twenty-eight million, six hundred forty-five thousand, one hundred eighty-three".