128391119 has 8 divisors (see below), whose sum is σ = 133774848. Its totient is φ = 123085080.

The previous prime is 128391097. The next prime is 128391173. The reversal of 128391119 is 911193821.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128391119 is a prime.

It is a super-2 number, since 2×128391119² = 32968558876144322, which contains 22 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 (128391199) 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, 16037 + ... + 22670.

It is an arithmetic number, because the mean of its divisors is an integer number (16721856).

Almost surely, 2^128391119 is an apocalyptic number.

128391119 is a deficient number, since it is larger than the sum of its proper divisors (5383729).

128391119 is a wasteful number, since it uses less digits than its factorization.

128391119 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38845.

The product of its digits is 3888, while the sum is 35.

The square root of 128391119 is about 11330.9804959677. The cubic root of 128391119 is about 504.4812095378.

The spelling of 128391119 in words is "one hundred twenty-eight million, three hundred ninety-one thousand, one hundred nineteen".