128359823 has 2 divisors, whose sum is σ = 128359824. Its totient is φ = 128359822.

The previous prime is 128359787. The next prime is 128359837. The reversal of 128359823 is 328953821.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 128359823 - 2¹⁰ = 128358799 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128359223) 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, 64179911 + 64179912.

It is an arithmetic number, because the mean of its divisors is an integer number (64179912).

Almost surely, 2^128359823 is an apocalyptic number.

128359823 is a deficient number, since it is larger than the sum of its proper divisors (1).

128359823 is an equidigital number, since it uses as much as digits as its factorization.

128359823 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 103680, while the sum is 41.

The square root of 128359823 is about 11329.5994192204. The cubic root of 128359823 is about 504.4402162380.

The spelling of 128359823 in words is "one hundred twenty-eight million, three hundred fifty-nine thousand, eight hundred twenty-three".