128975137 has 2 divisors, whose sum is σ = 128975138. Its totient is φ = 128975136.

The previous prime is 128975123. The next prime is 128975207. The reversal of 128975137 is 731579821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 102596641 + 26378496 = 10129^2 + 5136^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128975137 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 128975093 and 128975102.

It is not a weakly prime, because it can be changed into another prime (128975437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64487568 + 64487569.

It is an arithmetic number, because the mean of its divisors is an integer number (64487569).

Almost surely, 2^128975137 is an apocalyptic number.

It is an amenable number.

128975137 is a deficient number, since it is larger than the sum of its proper divisors (1).

128975137 is an equidigital number, since it uses as much as digits as its factorization.

128975137 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 105840, while the sum is 43.

The square root of 128975137 is about 11356.7221063122. The cubic root of 128975137 is about 505.2449708448.

The spelling of 128975137 in words is "one hundred twenty-eight million, nine hundred seventy-five thousand, one hundred thirty-seven".