649210682 has 4 divisors (see below), whose sum is σ = 973816026. Its totient is φ = 324605340.

The previous prime is 649210657. The next prime is 649210691. The reversal of 649210682 is 286012946.

649210682 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, and also an emirpimes, since its reverse is a distinct semiprime: 286012946 = 2 ⋅143006473.

It can be written as a sum of positive squares in only one way, i.e., 412943041 + 236267641 = 20321^2 + 15371^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 162302669 + ... + 162302672.

Almost surely, 2^649210682 is an apocalyptic number.

649210682 is a deficient number, since it is larger than the sum of its proper divisors (324605344).

649210682 is a wasteful number, since it uses less digits than its factorization.

649210682 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324605343.

The product of its (nonzero) digits is 41472, while the sum is 38.

The square root of 649210682 is about 25479.6130661358. The cubic root of 649210682 is about 865.8883283832. Note that the first 3 decimals are identical.

The spelling of 649210682 in words is "six hundred forty-nine million, two hundred ten thousand, six hundred eighty-two".