128682733 has 4 divisors (see below), whose sum is σ = 130792348. Its totient is φ = 126573120.

The previous prime is 128682731. The next prime is 128682737. The reversal of 128682733 is 337286821.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14235529 + 114447204 = 3773^2 + 10698^2 .

It is a cyclic number.

It is not a de Polignac number, because 128682733 - 2¹ = 128682731 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128682731) 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 in 3 ways as a sum of consecutive naturals, for example, 1054716 + ... + 1054837.

It is an arithmetic number, because the mean of its divisors is an integer number (32698087).

Almost surely, 2^128682733 is an apocalyptic number.

It is an amenable number.

128682733 is a deficient number, since it is larger than the sum of its proper divisors (2109615).

128682733 is an equidigital number, since it uses as much as digits as its factorization.

128682733 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2109614.

The product of its digits is 96768, while the sum is 40.

The square root of 128682733 is about 11343.8411924709. The cubic root of 128682733 is about 504.8628624781.

The spelling of 128682733 in words is "one hundred twenty-eight million, six hundred eighty-two thousand, seven hundred thirty-three".