128116423 has 4 divisors (see below), whose sum is σ = 130533768. Its totient is φ = 125699080.

The previous prime is 128116421. The next prime is 128116427. The reversal of 128116423 is 324611821.

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 128116423 - 2¹ = 128116421 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 128116391 and 128116400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128116421) 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, 1208593 + ... + 1208698.

It is an arithmetic number, because the mean of its divisors is an integer number (32633442).

Almost surely, 2^128116423 is an apocalyptic number.

128116423 is a deficient number, since it is larger than the sum of its proper divisors (2417345).

128116423 is an equidigital number, since it uses as much as digits as its factorization.

128116423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2417344.

The product of its digits is 2304, while the sum is 28.

The square root of 128116423 is about 11318.8525478513. The cubic root of 128116423 is about 504.1211692689.

The spelling of 128116423 in words is "one hundred twenty-eight million, one hundred sixteen thousand, four hundred twenty-three".