649741783 has 2 divisors, whose sum is σ = 649741784. Its totient is φ = 649741782.

The previous prime is 649741769. The next prime is 649741823. The reversal of 649741783 is 387147946.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-649741783 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (649741733) 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 as a sum of consecutive naturals, namely, 324870891 + 324870892.

It is an arithmetic number, because the mean of its divisors is an integer number (324870892).

Almost surely, 2^649741783 is an apocalyptic number.

649741783 is a deficient number, since it is larger than the sum of its proper divisors (1).

649741783 is an equidigital number, since it uses as much as digits as its factorization.

649741783 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1016064, while the sum is 49.

The square root of 649741783 is about 25490.0330129249. The cubic root of 649741783 is about 866.1243836544.

The spelling of 649741783 in words is "six hundred forty-nine million, seven hundred forty-one thousand, seven hundred eighty-three".