649216203 has 4 divisors (see below), whose sum is σ = 865621608. Its totient is φ = 432810800.

The previous prime is 649216189. The next prime is 649216223. The reversal of 649216203 is 302612946.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 649216203 - 2⁹ = 649215691 is a prime.

It is not an unprimeable number, because it can be changed into a prime (649216223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 108202698 + ... + 108202703.

It is an arithmetic number, because the mean of its divisors is an integer number (216405402).

Almost surely, 2^649216203 is an apocalyptic number.

649216203 is a deficient number, since it is larger than the sum of its proper divisors (216405405).

649216203 is a wasteful number, since it uses less digits than its factorization.

649216203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216405404.

The product of its (nonzero) digits is 15552, while the sum is 33.

The square root of 649216203 is about 25479.7214074252. The cubic root of 649216203 is about 865.8907829310.

The spelling of 649216203 in words is "six hundred forty-nine million, two hundred sixteen thousand, two hundred three".