128326079 has 4 divisors (see below), whose sum is σ = 146658384. Its totient is φ = 109993776.

The previous prime is 128325983. The next prime is 128326097. The reversal of 128326079 is 970623821.

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 128326079 - 2⁸ = 128325823 is a prime.

It is a super-3 number, since 3×128326079³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128326579) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9166142 + ... + 9166155.

It is an arithmetic number, because the mean of its divisors is an integer number (36664596).

Almost surely, 2^128326079 is an apocalyptic number.

128326079 is a deficient number, since it is larger than the sum of its proper divisors (18332305).

128326079 is an equidigital number, since it uses as much as digits as its factorization.

128326079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18332304.

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 128326079 is about 11328.1101248178. The cubic root of 128326079 is about 504.3960089409.

The spelling of 128326079 in words is "one hundred twenty-eight million, three hundred twenty-six thousand, seventy-nine".