128419927 has 2 divisors, whose sum is σ = 128419928. Its totient is φ = 128419926.

The previous prime is 128419909. The next prime is 128419937. The reversal of 128419927 is 729914821.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 128419927 - 2⁷ = 128419799 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128419937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64209963 + 64209964.

It is an arithmetic number, because the mean of its divisors is an integer number (64209964).

Almost surely, 2^128419927 is an apocalyptic number.

128419927 is a deficient number, since it is larger than the sum of its proper divisors (1).

128419927 is an equidigital number, since it uses as much as digits as its factorization.

128419927 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72576, while the sum is 43.

The square root of 128419927 is about 11332.2516297513. The cubic root of 128419927 is about 504.5189380245.

The spelling of 128419927 in words is "one hundred twenty-eight million, four hundred nineteen thousand, nine hundred twenty-seven".