128775047 has 2 divisors, whose sum is σ = 128775048. Its totient is φ = 128775046.

The previous prime is 128775037. The next prime is 128775071. The reversal of 128775047 is 740577821.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 128775047 - 2²⁰ = 127726471 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 128774995 and 128775013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128775007) 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, 64387523 + 64387524.

It is an arithmetic number, because the mean of its divisors is an integer number (64387524).

Almost surely, 2^128775047 is an apocalyptic number.

128775047 is a deficient number, since it is larger than the sum of its proper divisors (1).

128775047 is an equidigital number, since it uses as much as digits as its factorization.

128775047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 109760, while the sum is 41.

The square root of 128775047 is about 11347.9093669275. The cubic root of 128775047 is about 504.9835592465.

The spelling of 128775047 in words is "one hundred twenty-eight million, seven hundred seventy-five thousand, forty-seven".