648411217 has 2 divisors, whose sum is σ = 648411218. Its totient is φ = 648411216.

The previous prime is 648411209. The next prime is 648411241. The reversal of 648411217 is 712114846.

It is a happy number.

648411217 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., 499790736 + 148620481 = 22356^2 + 12191^2 .

It is a cyclic number.

It is not a de Polignac number, because 648411217 - 2³ = 648411209 is a prime.

It is not a weakly prime, because it can be changed into another prime (648411277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324205608 + 324205609.

It is an arithmetic number, because the mean of its divisors is an integer number (324205609).

Almost surely, 2^648411217 is an apocalyptic number.

It is an amenable number.

648411217 is a deficient number, since it is larger than the sum of its proper divisors (1).

648411217 is an equidigital number, since it uses as much as digits as its factorization.

648411217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10752, while the sum is 34.

The square root of 648411217 is about 25463.9199064088. The cubic root of 648411217 is about 865.5327521015.

The spelling of 648411217 in words is "six hundred forty-eight million, four hundred eleven thousand, two hundred seventeen".