648303613 has 4 divisors (see below), whose sum is σ = 670658940. Its totient is φ = 625948288.

The previous prime is 648303611. The next prime is 648303637. The reversal of 648303613 is 316303846.

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 141063129 + 507240484 = 11877^2 + 22522^2 .

It is a cyclic number.

It is not a de Polignac number, because 648303613 - 2¹ = 648303611 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 (648303611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11177620 + ... + 11177677.

It is an arithmetic number, because the mean of its divisors is an integer number (167664735).

Almost surely, 2^648303613 is an apocalyptic number.

It is an amenable number.

648303613 is a deficient number, since it is larger than the sum of its proper divisors (22355327).

648303613 is a wasteful number, since it uses less digits than its factorization.

648303613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22355326.

The product of its (nonzero) digits is 31104, while the sum is 34.

The square root of 648303613 is about 25461.8069468763. The cubic root of 648303613 is about 865.4848709955.

The spelling of 648303613 in words is "six hundred forty-eight million, three hundred three thousand, six hundred thirteen".