128883919 has 4 divisors (see below), whose sum is σ = 136465344. Its totient is φ = 121302496.

The previous prime is 128883899. The next prime is 128883929. The reversal of 128883919 is 919388821.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 128883919 - 2⁹ = 128883407 is a prime.

It is a super-2 number, since 2×128883919² = 33222129153597122, which contains 22 as substring.

It is a Duffinian number.

It is a zygodrome in base 3.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128883929) 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, 3790687 + ... + 3790720.

It is an arithmetic number, because the mean of its divisors is an integer number (34116336).

Almost surely, 2^128883919 is an apocalyptic number.

128883919 is a deficient number, since it is larger than the sum of its proper divisors (7581425).

128883919 is an equidigital number, since it uses as much as digits as its factorization.

128883919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7581424.

The product of its digits is 248832, while the sum is 49.

The square root of 128883919 is about 11352.7053603976. The cubic root of 128883919 is about 505.1258308145.

It can be divided in two parts, 12888 and 3919, that added together give a 5-th power (16807 = 7⁵).

The spelling of 128883919 in words is "one hundred twenty-eight million, eight hundred eighty-three thousand, nine hundred nineteen".