648522889 has 6 divisors (see below), whose sum is σ = 754404234. Its totient is φ = 555876720.

The previous prime is 648522887. The next prime is 648522913. The reversal of 648522889 is 988225846.

648522889 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 595116025 + 53406864 = 24395^2 + 7308^2 .

It is not a de Polignac number, because 648522889 - 2¹ = 648522887 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (648522887) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6617532 + ... + 6617629.

It is an arithmetic number, because the mean of its divisors is an integer number (125734039).

Almost surely, 2^648522889 is an apocalyptic number.

It is an amenable number.

648522889 is a deficient number, since it is larger than the sum of its proper divisors (105881345).

648522889 is a wasteful number, since it uses less digits than its factorization.

648522889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13235175 (or 13235168 counting only the distinct ones).

The product of its digits is 2211840, while the sum is 52.

The square root of 648522889 is about 25466.1125615984. The cubic root of 648522889 is about 865.5824377653.

The spelling of 648522889 in words is "six hundred forty-eight million, five hundred twenty-two thousand, eight hundred eighty-nine".