649869206 has 16 divisors (see below), whose sum is σ = 1114434816. Its totient is φ = 278422056.

The previous prime is 649869203. The next prime is 649869263. The reversal of 649869206 is 602968946.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649869203) 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 7 ways as a sum of consecutive naturals, for example, 50615 + ... + 62141.

It is an arithmetic number, because the mean of its divisors is an integer number (69652176).

Almost surely, 2^649869206 is an apocalyptic number.

649869206 is a deficient number, since it is larger than the sum of its proper divisors (464565610).

649869206 is a wasteful number, since it uses less digits than its factorization.

649869206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15563.

The product of its (nonzero) digits is 1119744, while the sum is 50.

The square root of 649869206 is about 25492.5323575356. The cubic root of 649869206 is about 866.1809994549.

The spelling of 649869206 in words is "six hundred forty-nine million, eight hundred sixty-nine thousand, two hundred six".