128765113 has 2 divisors, whose sum is σ = 128765114. Its totient is φ = 128765112.

The previous prime is 128765093. The next prime is 128765149. The reversal of 128765113 is 311567821.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 89927289 + 38837824 = 9483^2 + 6232^2 .

It is a cyclic number.

It is not a de Polignac number, because 128765113 - 2²⁵ = 95210681 is a prime.

It is not a weakly prime, because it can be changed into another prime (128760113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64382556 + 64382557.

It is an arithmetic number, because the mean of its divisors is an integer number (64382557).

Almost surely, 2^128765113 is an apocalyptic number.

It is an amenable number.

128765113 is a deficient number, since it is larger than the sum of its proper divisors (1).

128765113 is an equidigital number, since it uses as much as digits as its factorization.

128765113 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10080, while the sum is 34.

The square root of 128765113 is about 11347.4716567172. The cubic root of 128765113 is about 504.9705737191.

The spelling of 128765113 in words is "one hundred twenty-eight million, seven hundred sixty-five thousand, one hundred thirteen".