128023197 has 32 divisors (see below), whose sum is σ = 190512000. Its totient is φ = 76124160.

The previous prime is 128023177. The next prime is 128023199. The reversal of 128023197 is 791320821.

It is not a de Polignac number, because 128023197 - 2⁷ = 128023069 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128023199) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 66829 + ... + 68717.

It is an arithmetic number, because the mean of its divisors is an integer number (5953500).

Almost surely, 2^128023197 is an apocalyptic number.

It is an amenable number.

128023197 is a deficient number, since it is larger than the sum of its proper divisors (62488803).

128023197 is a wasteful number, since it uses less digits than its factorization.

128023197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1981.

The product of its (nonzero) digits is 6048, while the sum is 33.

The square root of 128023197 is about 11314.7336247921. The cubic root of 128023197 is about 503.9988622738.

The spelling of 128023197 in words is "one hundred twenty-eight million, twenty-three thousand, one hundred ninety-seven".