128392159 has 4 divisors (see below), whose sum is σ = 146733904. Its totient is φ = 110050416.

The previous prime is 128392157. The next prime is 128392163. The reversal of 128392159 is 951293821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 951293821 = 1237 ⋅769033.

It is not a de Polignac number, because 128392159 - 2¹ = 128392157 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 (128392151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9170862 + ... + 9170875.

It is an arithmetic number, because the mean of its divisors is an integer number (36683476).

Almost surely, 2^128392159 is an apocalyptic number.

128392159 is a deficient number, since it is larger than the sum of its proper divisors (18341745).

128392159 is an equidigital number, since it uses as much as digits as its factorization.

128392159 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18341744.

The product of its digits is 38880, while the sum is 40.

The square root of 128392159 is about 11331.0263877550. The cubic root of 128392159 is about 504.4825716753.

The spelling of 128392159 in words is "one hundred twenty-eight million, three hundred ninety-two thousand, one hundred fifty-nine".