649602783 has 12 divisors (see below), whose sum is σ = 938599168. Its totient is φ = 432937440.

The previous prime is 649602781. The next prime is 649602851. The reversal of 649602783 is 387206946.

It is not a de Polignac number, because 649602783 - 2¹ = 649602781 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 (649602781) 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 11 ways as a sum of consecutive naturals, for example, 27618 + ... + 45408.

Almost surely, 2^649602783 is an apocalyptic number.

649602783 is a deficient number, since it is larger than the sum of its proper divisors (288996385).

649602783 is a wasteful number, since it uses less digits than its factorization.

649602783 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21854 (or 21851 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 45.

The square root of 649602783 is about 25487.3063111817. The cubic root of 649602783 is about 866.0626155907.

The spelling of 649602783 in words is "six hundred forty-nine million, six hundred two thousand, seven hundred eighty-three".