648384293 has 4 divisors (see below), whose sum is σ = 650308620. Its totient is φ = 646459968.

The previous prime is 648384281. The next prime is 648384299. The reversal of 648384293 is 392483846.

648384293 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 398681089 + 249703204 = 19967^2 + 15802^2 .

It is a cyclic number.

It is not a de Polignac number, because 648384293 - 2¹⁰ = 648383269 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 (648384299) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 961658 + ... + 962331.

It is an arithmetic number, because the mean of its divisors is an integer number (162577155).

Almost surely, 2^648384293 is an apocalyptic number.

It is an amenable number.

648384293 is a deficient number, since it is larger than the sum of its proper divisors (1924327).

648384293 is a wasteful number, since it uses less digits than its factorization.

648384293 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1924326.

The product of its digits is 995328, while the sum is 47.

The square root of 648384293 is about 25463.3912313344. The cubic root of 648384293 is about 865.5207720875.

The spelling of 648384293 in words is "six hundred forty-eight million, three hundred eighty-four thousand, two hundred ninety-three".