128347423 has 2 divisors, whose sum is σ = 128347424. Its totient is φ = 128347422.

The previous prime is 128347403. The next prime is 128347441. The reversal of 128347423 is 324743821.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 128347423 - 2¹³ = 128339231 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128347403) 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, 64173711 + 64173712.

It is an arithmetic number, because the mean of its divisors is an integer number (64173712).

Almost surely, 2^128347423 is an apocalyptic number.

128347423 is a deficient number, since it is larger than the sum of its proper divisors (1).

128347423 is an equidigital number, since it uses as much as digits as its factorization.

128347423 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32256, while the sum is 34.

The square root of 128347423 is about 11329.0521668849. The cubic root of 128347423 is about 504.4239721621.

The spelling of 128347423 in words is "one hundred twenty-eight million, three hundred forty-seven thousand, four hundred twenty-three".