128828633 has 2 divisors, whose sum is σ = 128828634. Its totient is φ = 128828632.

The previous prime is 128828621. The next prime is 128828639. The reversal of 128828633 is 336828821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 128777104 + 51529 = 11348^2 + 227^2 .

It is a cyclic number.

It is not a de Polignac number, because 128828633 - 2⁴ = 128828617 is a prime.

It is not a weakly prime, because it can be changed into another prime (128828639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64414316 + 64414317.

It is an arithmetic number, because the mean of its divisors is an integer number (64414317).

Almost surely, 2^128828633 is an apocalyptic number.

It is an amenable number.

128828633 is a deficient number, since it is larger than the sum of its proper divisors (1).

128828633 is an equidigital number, since it uses as much as digits as its factorization.

128828633 is an evil number, because the sum of its binary digits is even.

The product of its digits is 110592, while the sum is 41.

The square root of 128828633 is about 11350.2701729959. The cubic root of 128828633 is about 505.0535942858.

The spelling of 128828633 in words is "one hundred twenty-eight million, eight hundred twenty-eight thousand, six hundred thirty-three".