128325999 has 8 divisors (see below), whose sum is σ = 171176320. Its totient is φ = 85513176.

The previous prime is 128325983. The next prime is 128326097. The reversal of 128325999 is 999523821.

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

It is not a de Polignac number, because 128325999 - 2⁴ = 128325983 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 (128325919) 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, 67 + ... + 16020.

It is an arithmetic number, because the mean of its divisors is an integer number (21397040).

Almost surely, 2^128325999 is an apocalyptic number.

128325999 is a deficient number, since it is larger than the sum of its proper divisors (42850321).

128325999 is a wasteful number, since it uses less digits than its factorization.

128325999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18749.

The product of its digits is 349920, while the sum is 48.

The square root of 128325999 is about 11328.1065937782. The cubic root of 128325999 is about 504.3959041254.

The spelling of 128325999 in words is "one hundred twenty-eight million, three hundred twenty-five thousand, nine hundred ninety-nine".