128264173 has 2 divisors, whose sum is σ = 128264174. Its totient is φ = 128264172.

The previous prime is 128264137. The next prime is 128264177. The reversal of 128264173 is 371462821.

Together with previous prime (128264137) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 127644804 + 619369 = 11298^2 + 787^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128264173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128264177) 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 as a sum of consecutive naturals, namely, 64132086 + 64132087.

It is an arithmetic number, because the mean of its divisors is an integer number (64132087).

Almost surely, 2^128264173 is an apocalyptic number.

It is an amenable number.

128264173 is a deficient number, since it is larger than the sum of its proper divisors (1).

128264173 is an equidigital number, since it uses as much as digits as its factorization.

128264173 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16128, while the sum is 34.

The square root of 128264173 is about 11325.3773888555. The cubic root of 128264173 is about 504.3148870519.

The spelling of 128264173 in words is "one hundred twenty-eight million, two hundred sixty-four thousand, one hundred seventy-three".