649928013 has 24 divisors (see below), whose sum is σ = 1012544352. Its totient is φ = 369732384.

The previous prime is 649927987. The next prime is 649928053. The reversal of 649928013 is 310829946.

It is not a de Polignac number, because 649928013 - 2⁵ = 649927981 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649928053) 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 23 ways as a sum of consecutive naturals, for example, 23631 + ... + 43107.

It is an arithmetic number, because the mean of its divisors is an integer number (42189348).

Almost surely, 2^649928013 is an apocalyptic number.

It is an amenable number.

649928013 is a deficient number, since it is larger than the sum of its proper divisors (362616339).

649928013 is a wasteful number, since it uses less digits than its factorization.

649928013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19721 (or 19714 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 42.

The square root of 649928013 is about 25493.6857476513. The cubic root of 649928013 is about 866.2071257221.

The spelling of 649928013 in words is "six hundred forty-nine million, nine hundred twenty-eight thousand, thirteen".