648613 has 16 divisors (see below), whose sum is σ = 793600. Its totient is φ = 529200.

The previous prime is 648607. The next prime is 648617. The reversal of 648613 is 316846.

It is not a de Polignac number, because 648613 - 2⁹ = 648101 is a prime.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648617) 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 15 ways as a sum of consecutive naturals, for example, 10603 + ... + 10663.

It is an arithmetic number, because the mean of its divisors is an integer number (49600).

2⁶⁴⁸⁶¹³ is an apocalyptic number.

It is an amenable number.

648613 is a deficient number, since it is larger than the sum of its proper divisors (144987).

648613 is an equidigital number, since it uses as much as digits as its factorization.

648613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113 (or 99 counting only the distinct ones).

The product of its digits is 3456, while the sum is 28.

The square root of 648613 is about 805.3651345818. The cubic root of 648613 is about 86.5622526243.

The spelling of 648613 in words is "six hundred forty-eight thousand, six hundred thirteen".