128336851 has 2 divisors, whose sum is σ = 128336852. Its totient is φ = 128336850.

The previous prime is 128336839. The next prime is 128336881. The reversal of 128336851 is 158633821.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 128336851 - 2²¹ = 126239699 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 128336851.

It is not a weakly prime, because it can be changed into another prime (128336881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64168425 + 64168426.

It is an arithmetic number, because the mean of its divisors is an integer number (64168426).

Almost surely, 2^128336851 is an apocalyptic number.

128336851 is a deficient number, since it is larger than the sum of its proper divisors (1).

128336851 is an equidigital number, since it uses as much as digits as its factorization.

128336851 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34560, while the sum is 37.

The square root of 128336851 is about 11328.5855692580. The cubic root of 128336851 is about 504.4101219511.

The spelling of 128336851 in words is "one hundred twenty-eight million, three hundred thirty-six thousand, eight hundred fifty-one".