648565423 has 4 divisors (see below), whose sum is σ = 707525928. Its totient is φ = 589604920.

The previous prime is 648565387. The next prime is 648565447. The reversal of 648565423 is 324565846.

648565423 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 is a cyclic number.

It is not a de Polignac number, because 648565423 - 2⁹ = 648564911 is a prime.

It is a super-2 number, since 2×648565423² = 841274215822337858, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 648565423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648565123) 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, 29480236 + ... + 29480257.

It is an arithmetic number, because the mean of its divisors is an integer number (176881482).

Almost surely, 2^648565423 is an apocalyptic number.

648565423 is a deficient number, since it is larger than the sum of its proper divisors (58960505).

648565423 is a wasteful number, since it uses less digits than its factorization.

648565423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58960504.

The product of its digits is 691200, while the sum is 43.

The square root of 648565423 is about 25466.9476576994. The cubic root of 648565423 is about 865.6013607050.

The spelling of 648565423 in words is "six hundred forty-eight million, five hundred sixty-five thousand, four hundred twenty-three".