649919603 has 2 divisors, whose sum is σ = 649919604. Its totient is φ = 649919602.

The previous prime is 649919593. The next prime is 649919617. The reversal of 649919603 is 306919946.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 649919603 - 2⁶ = 649919539 is a prime.

It is not a weakly prime, because it can be changed into another prime (649919663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324959801 + 324959802.

It is an arithmetic number, because the mean of its divisors is an integer number (324959802).

Almost surely, 2^649919603 is an apocalyptic number.

649919603 is a deficient number, since it is larger than the sum of its proper divisors (1).

649919603 is an equidigital number, since it uses as much as digits as its factorization.

649919603 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 314928, while the sum is 47.

The square root of 649919603 is about 25493.5208043142. The cubic root of 649919603 is about 866.2033894964.

The spelling of 649919603 in words is "six hundred forty-nine million, nine hundred nineteen thousand, six hundred three".