128008873 has 4 divisors (see below), whose sum is σ = 128507220. Its totient is φ = 127510528.

The previous prime is 128008843. The next prime is 128008897. The reversal of 128008873 is 378800821.

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 97061904 + 30946969 = 9852^2 + 5563^2 .

It is a cyclic number.

It is not a de Polignac number, because 128008873 - 2¹⁷ = 127877801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128008843) 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, 248788 + ... + 249301.

It is an arithmetic number, because the mean of its divisors is an integer number (32126805).

Almost surely, 2^128008873 is an apocalyptic number.

It is an amenable number.

128008873 is a deficient number, since it is larger than the sum of its proper divisors (498347).

128008873 is an equidigital number, since it uses as much as digits as its factorization.

128008873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 498346.

The product of its (nonzero) digits is 21504, while the sum is 37.

The square root of 128008873 is about 11314.1006270936. The cubic root of 128008873 is about 503.9800647717.

It can be divided in two parts, 128008 and 873, that added together give a square (128881 = 359²).

The spelling of 128008873 in words is "one hundred twenty-eight million, eight thousand, eight hundred seventy-three".