128816423 has 2 divisors, whose sum is σ = 128816424. Its totient is φ = 128816422.

The previous prime is 128816417. The next prime is 128816431. The reversal of 128816423 is 324618821.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 128816423 - 2⁸ = 128816167 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128816483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64408211 + 64408212.

It is an arithmetic number, because the mean of its divisors is an integer number (64408212).

Almost surely, 2^128816423 is an apocalyptic number.

128816423 is a deficient number, since it is larger than the sum of its proper divisors (1).

128816423 is an equidigital number, since it uses as much as digits as its factorization.

128816423 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18432, while the sum is 35.

The square root of 128816423 is about 11349.7322875916. The cubic root of 128816423 is about 505.0376379489.

The spelling of 128816423 in words is "one hundred twenty-eight million, eight hundred sixteen thousand, four hundred twenty-three".