128395197 has 12 divisors (see below), whose sum is σ = 211954080. Its totient is φ = 73368648.

The previous prime is 128395171. The next prime is 128395199. The reversal of 128395197 is 791593821.

128395197 is a `hidden beast` number, since 128 + 3 + 9 + 519 + 7 = 666.

It is not a de Polignac number, because 128395197 - 2¹¹ = 128393149 is a prime.

It is a super-2 number, since 2×128395197² = 32970653225337618, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128395199) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1018947 + ... + 1019072.

It is an arithmetic number, because the mean of its divisors is an integer number (17662840).

Almost surely, 2^128395197 is an apocalyptic number.

It is an amenable number.

128395197 is a deficient number, since it is larger than the sum of its proper divisors (83558883).

128395197 is a wasteful number, since it uses less digits than its factorization.

128395197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2038032 (or 2038029 counting only the distinct ones).

The product of its digits is 136080, while the sum is 45.

The square root of 128395197 is about 11331.1604436615. The cubic root of 128395197 is about 504.4865506461.

The spelling of 128395197 in words is "one hundred twenty-eight million, three hundred ninety-five thousand, one hundred ninety-seven".