128319071 has 16 divisors (see below), whose sum is σ = 135990144. Its totient is φ = 120927744.

The previous prime is 128319067. The next prime is 128319119. The reversal of 128319071 is 170913821.

It is a cyclic number.

It is not a de Polignac number, because 128319071 - 2² = 128319067 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 (128319011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 196181 + ... + 196833.

It is an arithmetic number, because the mean of its divisors is an integer number (8499384).

Almost surely, 2^128319071 is an apocalyptic number.

128319071 is a deficient number, since it is larger than the sum of its proper divisors (7671073).

128319071 is a wasteful number, since it uses less digits than its factorization.

128319071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 850.

The product of its (nonzero) digits is 3024, while the sum is 32.

The square root of 128319071 is about 11327.8008015678. The cubic root of 128319071 is about 504.3868269372.

The spelling of 128319071 in words is "one hundred twenty-eight million, three hundred nineteen thousand, seventy-one".