128703823 has 2 divisors, whose sum is σ = 128703824. Its totient is φ = 128703822.

The previous prime is 128703767. The next prime is 128703829. The reversal of 128703823 is 328307821.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128703823 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128703829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64351911 + 64351912.

It is an arithmetic number, because the mean of its divisors is an integer number (64351912).

Almost surely, 2^128703823 is an apocalyptic number.

128703823 is a deficient number, since it is larger than the sum of its proper divisors (1).

128703823 is an equidigital number, since it uses as much as digits as its factorization.

128703823 is an odious number, because the sum of its binary digits is odd.

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

The square root of 128703823 is about 11344.7707336905. The cubic root of 128703823 is about 504.8904418741.

The spelling of 128703823 in words is "one hundred twenty-eight million, seven hundred three thousand, eight hundred twenty-three".