128914187 has 2 divisors, whose sum is σ = 128914188. Its totient is φ = 128914186.

The previous prime is 128914153. The next prime is 128914207. The reversal of 128914187 is 781419821.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 128914187 - 2¹² = 128910091 is a prime.

It is not a weakly prime, because it can be changed into another prime (128914117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64457093 + 64457094.

It is an arithmetic number, because the mean of its divisors is an integer number (64457094).

Almost surely, 2^128914187 is an apocalyptic number.

128914187 is a deficient number, since it is larger than the sum of its proper divisors (1).

128914187 is an equidigital number, since it uses as much as digits as its factorization.

128914187 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32256, while the sum is 41.

The square root of 128914187 is about 11354.0383564615. The cubic root of 128914187 is about 505.1653701459.

The spelling of 128914187 in words is "one hundred twenty-eight million, nine hundred fourteen thousand, one hundred eighty-seven".