649399603 has 2 divisors, whose sum is σ = 649399604. Its totient is φ = 649399602.

The previous prime is 649399573. The next prime is 649399721. The reversal of 649399603 is 306993946.

649399603 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-649399603 is a prime.

It is not a weakly prime, because it can be changed into another prime (649799603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324699801 + 324699802.

It is an arithmetic number, because the mean of its divisors is an integer number (324699802).

Almost surely, 2^649399603 is an apocalyptic number.

649399603 is a deficient number, since it is larger than the sum of its proper divisors (1).

649399603 is an equidigital number, since it uses as much as digits as its factorization.

649399603 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 944784, while the sum is 49.

The square root of 649399603 is about 25483.3200937397. The cubic root of 649399603 is about 865.9723117126.

The spelling of 649399603 in words is "six hundred forty-nine million, three hundred ninety-nine thousand, six hundred three".