128672633 has 2 divisors, whose sum is σ = 128672634. Its totient is φ = 128672632.

The previous prime is 128672611. The next prime is 128672657. The reversal of 128672633 is 336276821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 109767529 + 18905104 = 10477^2 + 4348^2 .

It is a cyclic number.

It is not a de Polignac number, because 128672633 - 2¹⁸ = 128410489 is a prime.

It is not a weakly prime, because it can be changed into another prime (128672683) 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, 64336316 + 64336317.

It is an arithmetic number, because the mean of its divisors is an integer number (64336317).

Almost surely, 2^128672633 is an apocalyptic number.

It is an amenable number.

128672633 is a deficient number, since it is larger than the sum of its proper divisors (1).

128672633 is an equidigital number, since it uses as much as digits as its factorization.

128672633 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72576, while the sum is 38.

The square root of 128672633 is about 11343.3960082508. The cubic root of 128672633 is about 504.8496536396.

The spelling of 128672633 in words is "one hundred twenty-eight million, six hundred seventy-two thousand, six hundred thirty-three".