649564603 has 2 divisors, whose sum is σ = 649564604. Its totient is φ = 649564602.

The previous prime is 649564561. The next prime is 649564613. The reversal of 649564603 is 306465946.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 649564603 - 2¹⁷ = 649433531 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 649564603.

It is not a weakly prime, because it can be changed into another prime (649564613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324782301 + 324782302.

It is an arithmetic number, because the mean of its divisors is an integer number (324782302).

Almost surely, 2^649564603 is an apocalyptic number.

649564603 is a deficient number, since it is larger than the sum of its proper divisors (1).

649564603 is an equidigital number, since it uses as much as digits as its factorization.

649564603 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 466560, while the sum is 43.

The square root of 649564603 is about 25486.5572998787. The cubic root of 649564603 is about 866.0456478275.

The spelling of 649564603 in words is "six hundred forty-nine million, five hundred sixty-four thousand, six hundred three".