128755099 has 8 divisors (see below), whose sum is σ = 145303920. Its totient is φ = 113013600.

The previous prime is 128755097. The next prime is 128755111. The reversal of 128755099 is 990557821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 128755099 - 2¹ = 128755097 is a prime.

It is not an unprimeable number, because it can be changed into a prime (128755091) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 201492 + ... + 202129.

It is an arithmetic number, because the mean of its divisors is an integer number (18162990).

Almost surely, 2^128755099 is an apocalyptic number.

128755099 is a deficient number, since it is larger than the sum of its proper divisors (16548821).

128755099 is a wasteful number, since it uses less digits than its factorization.

128755099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403661.

The product of its (nonzero) digits is 226800, while the sum is 46.

The square root of 128755099 is about 11347.0304044715. The cubic root of 128755099 is about 504.9574829414.

The spelling of 128755099 in words is "one hundred twenty-eight million, seven hundred fifty-five thousand, ninety-nine".