648775 has 6 divisors (see below), whose sum is σ = 804512. Its totient is φ = 519000.

The previous prime is 648763. The next prime is 648779. The reversal of 648775 is 577846.

It is a happy number.

It is not a de Polignac number, because 648775 - 2¹³ = 640583 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 (648779) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12951 + ... + 13000.

2⁶⁴⁸⁷⁷⁵ is an apocalyptic number.

648775 is a deficient number, since it is larger than the sum of its proper divisors (155737).

648775 is a wasteful number, since it uses less digits than its factorization.

648775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25961 (or 25956 counting only the distinct ones).

The product of its digits is 47040, while the sum is 37.

The square root of 648775 is about 805.4657038012. The cubic root of 648775 is about 86.5694587280.

The spelling of 648775 in words is "six hundred forty-eight thousand, seven hundred seventy-five".