128775307 has 2 divisors, whose sum is σ = 128775308. Its totient is φ = 128775306.

The previous prime is 128775233. The next prime is 128775329. The reversal of 128775307 is 703577821.

It is a strong prime.

It is an emirp because it is prime and its reverse (703577821) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 128775307 - 2²³ = 120386699 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 128775307.

It is not a weakly prime, because it can be changed into another prime (128775377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64387653 + 64387654.

It is an arithmetic number, because the mean of its divisors is an integer number (64387654).

Almost surely, 2^128775307 is an apocalyptic number.

128775307 is a deficient number, since it is larger than the sum of its proper divisors (1).

128775307 is an equidigital number, since it uses as much as digits as its factorization.

128775307 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 82320, while the sum is 40.

The square root of 128775307 is about 11347.9208227763. The cubic root of 128775307 is about 504.9838991043.

The spelling of 128775307 in words is "one hundred twenty-eight million, seven hundred seventy-five thousand, three hundred seven".