128043313 has 2 divisors, whose sum is σ = 128043314. Its totient is φ = 128043312.

The previous prime is 128043271. The next prime is 128043329. The reversal of 128043313 is 313340821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 123476544 + 4566769 = 11112^2 + 2137^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128043313 is a prime.

It is not a weakly prime, because it can be changed into another prime (128043373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64021656 + 64021657.

It is an arithmetic number, because the mean of its divisors is an integer number (64021657).

Almost surely, 2^128043313 is an apocalyptic number.

It is an amenable number.

128043313 is a deficient number, since it is larger than the sum of its proper divisors (1).

128043313 is an equidigital number, since it uses as much as digits as its factorization.

128043313 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 128043313 is about 11315.6225193314. The cubic root of 128043313 is about 504.0252582978.

The spelling of 128043313 in words is "one hundred twenty-eight million, forty-three thousand, three hundred thirteen".