648328789 has 2 divisors, whose sum is σ = 648328790. Its totient is φ = 648328788.

The previous prime is 648328741. The next prime is 648328861. The reversal of 648328789 is 987823846.

648328789 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 401681764 + 246647025 = 20042^2 + 15705^2 .

It is a cyclic number.

It is not a de Polignac number, because 648328789 - 2¹⁵ = 648296021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (648322789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324164394 + 324164395.

It is an arithmetic number, because the mean of its divisors is an integer number (324164395).

Almost surely, 2^648328789 is an apocalyptic number.

It is an amenable number.

648328789 is a deficient number, since it is larger than the sum of its proper divisors (1).

648328789 is an equidigital number, since it uses as much as digits as its factorization.

648328789 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4644864, while the sum is 55.

The square root of 648328789 is about 25462.3013296128. The cubic root of 648328789 is about 865.4960741646.

The spelling of 648328789 in words is "six hundred forty-eight million, three hundred twenty-eight thousand, seven hundred eighty-nine".