128910863 has 2 divisors, whose sum is σ = 128910864. Its totient is φ = 128910862.

The previous prime is 128910851. The next prime is 128910889. The reversal of 128910863 is 368019821.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 128910863 - 2¹⁰ = 128909839 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128910833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64455431 + 64455432.

It is an arithmetic number, because the mean of its divisors is an integer number (64455432).

Almost surely, 2^128910863 is an apocalyptic number.

128910863 is a deficient number, since it is larger than the sum of its proper divisors (1).

128910863 is an equidigital number, since it uses as much as digits as its factorization.

128910863 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 38.

The square root of 128910863 is about 11353.8919758821. The cubic root of 128910863 is about 505.1610282805.

The spelling of 128910863 in words is "one hundred twenty-eight million, nine hundred ten thousand, eight hundred sixty-three".