648389263 has 4 divisors (see below), whose sum is σ = 648456840. Its totient is φ = 648321688.

The previous prime is 648389243. The next prime is 648389267. The reversal of 648389263 is 362983846.

It is a happy number.

648389263 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, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 362983846 = 2 ⋅181491923.

It is a cyclic number.

It is not a de Polignac number, because 648389263 - 2⁹ = 648388751 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 (648389267) 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, 16420 + ... + 39577.

It is an arithmetic number, because the mean of its divisors is an integer number (162114210).

Almost surely, 2^648389263 is an apocalyptic number.

648389263 is a deficient number, since it is larger than the sum of its proper divisors (67577).

648389263 is a wasteful number, since it uses less digits than its factorization.

648389263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67576.

The product of its digits is 1492992, while the sum is 49.

The square root of 648389263 is about 25463.4888222333. The cubic root of 648389263 is about 865.5229835472.

The spelling of 648389263 in words is "six hundred forty-eight million, three hundred eighty-nine thousand, two hundred sixty-three".