128901173 has 2 divisors, whose sum is σ = 128901174. Its totient is φ = 128901172.

The previous prime is 128901169. The next prime is 128901209. The reversal of 128901173 is 371109821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 117115684 + 11785489 = 10822^2 + 3433^2 .

It is a cyclic number.

It is not a de Polignac number, because 128901173 - 2² = 128901169 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128901373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64450586 + 64450587.

It is an arithmetic number, because the mean of its divisors is an integer number (64450587).

Almost surely, 2^128901173 is an apocalyptic number.

It is an amenable number.

128901173 is a deficient number, since it is larger than the sum of its proper divisors (1).

128901173 is an equidigital number, since it uses as much as digits as its factorization.

128901173 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3024, while the sum is 32.

The square root of 128901173 is about 11353.4652419427. The cubic root of 128901173 is about 505.1483706117.

The spelling of 128901173 in words is "one hundred twenty-eight million, nine hundred one thousand, one hundred seventy-three".