128875447 has 2 divisors, whose sum is σ = 128875448. Its totient is φ = 128875446.

The previous prime is 128875421. The next prime is 128875451. The reversal of 128875447 is 744578821.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 128875447 - 2⁷ = 128875319 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 128875397 and 128875406.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128875247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64437723 + 64437724.

It is an arithmetic number, because the mean of its divisors is an integer number (64437724).

Almost surely, 2^128875447 is an apocalyptic number.

128875447 is a deficient number, since it is larger than the sum of its proper divisors (1).

128875447 is an equidigital number, since it uses as much as digits as its factorization.

128875447 is an evil number, because the sum of its binary digits is even.

The product of its digits is 501760, while the sum is 46.

The square root of 128875447 is about 11352.3322273443. The cubic root of 128875447 is about 505.1147626641.

The spelling of 128875447 in words is "one hundred twenty-eight million, eight hundred seventy-five thousand, four hundred forty-seven".