128667047 has 2 divisors, whose sum is σ = 128667048. Its totient is φ = 128667046.

The previous prime is 128667043. The next prime is 128667053. The reversal of 128667047 is 740766821.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 128667047 - 2² = 128667043 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 128666995 and 128667013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128667043) 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, 64333523 + 64333524.

It is an arithmetic number, because the mean of its divisors is an integer number (64333524).

Almost surely, 2^128667047 is an apocalyptic number.

128667047 is a deficient number, since it is larger than the sum of its proper divisors (1).

128667047 is an equidigital number, since it uses as much as digits as its factorization.

128667047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 112896, while the sum is 41.

The square root of 128667047 is about 11343.1497830188. The cubic root of 128667047 is about 504.8423479395.

The spelling of 128667047 in words is "one hundred twenty-eight million, six hundred sixty-seven thousand, forty-seven".