128781703 has 2 divisors, whose sum is σ = 128781704. Its totient is φ = 128781702.

The previous prime is 128781691. The next prime is 128781713. The reversal of 128781703 is 307187821.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 128781703 - 2⁵ = 128781671 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128781713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64390851 + 64390852.

It is an arithmetic number, because the mean of its divisors is an integer number (64390852).

Almost surely, 2^128781703 is an apocalyptic number.

128781703 is a deficient number, since it is larger than the sum of its proper divisors (1).

128781703 is an equidigital number, since it uses as much as digits as its factorization.

128781703 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18816, while the sum is 37.

The square root of 128781703 is about 11348.2026330164. The cubic root of 128781703 is about 504.9922594637.

The spelling of 128781703 in words is "one hundred twenty-eight million, seven hundred eighty-one thousand, seven hundred three".