128936673 has 6 divisors (see below), whose sum is σ = 186241874. Its totient is φ = 85957776.

The previous prime is 128936671. The next prime is 128936693. The reversal of 128936673 is 376639821.

128936673 is a `hidden beast` number, since 1 + 289 + 366 + 7 + 3 = 666.

It can be written as a sum of positive squares in only one way, i.e., 128323584 + 613089 = 11328^2 + 783^2 .

It is not a de Polignac number, because 128936673 - 2¹ = 128936671 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (128936671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7163140 + ... + 7163157.

Almost surely, 2^128936673 is an apocalyptic number.

It is an amenable number.

128936673 is a deficient number, since it is larger than the sum of its proper divisors (57305201).

128936673 is a wasteful number, since it uses less digits than its factorization.

128936673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14326303 (or 14326300 counting only the distinct ones).

The product of its digits is 326592, while the sum is 45.

The square root of 128936673 is about 11355.0285336498. The cubic root of 128936673 is about 505.1947397816.

The spelling of 128936673 in words is "one hundred twenty-eight million, nine hundred thirty-six thousand, six hundred seventy-three".