128444633 has 2 divisors, whose sum is σ = 128444634. Its totient is φ = 128444632.

The previous prime is 128444597. The next prime is 128444651. The reversal of 128444633 is 336444821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 128436889 + 7744 = 11333^2 + 88^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128444633 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 128444593 and 128444602.

It is not a weakly prime, because it can be changed into another prime (128444663) 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, 64222316 + 64222317.

It is an arithmetic number, because the mean of its divisors is an integer number (64222317).

Almost surely, 2^128444633 is an apocalyptic number.

It is an amenable number.

128444633 is a deficient number, since it is larger than the sum of its proper divisors (1).

128444633 is an equidigital number, since it uses as much as digits as its factorization.

128444633 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 55296, while the sum is 35.

The square root of 128444633 is about 11333.3416519577. The cubic root of 128444633 is about 504.5512898199.

The spelling of 128444633 in words is "one hundred twenty-eight million, four hundred forty-four thousand, six hundred thirty-three".