128763827 has 2 divisors, whose sum is σ = 128763828. Its totient is φ = 128763826.

The previous prime is 128763809. The next prime is 128763841. The reversal of 128763827 is 728367821.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 128763827 - 2¹⁶ = 128698291 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (128763527) 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, 64381913 + 64381914.

It is an arithmetic number, because the mean of its divisors is an integer number (64381914).

Almost surely, 2^128763827 is an apocalyptic number.

128763827 is a deficient number, since it is larger than the sum of its proper divisors (1).

128763827 is an equidigital number, since it uses as much as digits as its factorization.

128763827 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 225792, while the sum is 44.

The square root of 128763827 is about 11347.4149919706. The cubic root of 128763827 is about 504.9688926367.

The spelling of 128763827 in words is "one hundred twenty-eight million, seven hundred sixty-three thousand, eight hundred twenty-seven".