649303 has 4 divisors (see below), whose sum is σ = 661608. Its totient is φ = 637000.

The previous prime is 649291. The next prime is 649307. The reversal of 649303 is 303946.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-649303 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 (649307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6073 + ... + 6178.

It is an arithmetic number, because the mean of its divisors is an integer number (165402).

2⁶⁴⁹³⁰³ is an apocalyptic number.

649303 is a deficient number, since it is larger than the sum of its proper divisors (12305).

649303 is a wasteful number, since it uses less digits than its factorization.

649303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12304.

The product of its (nonzero) digits is 1944, while the sum is 25.

The square root of 649303 is about 805.7933978384. The cubic root of 649303 is about 86.5929369652.

The spelling of 649303 in words is "six hundred forty-nine thousand, three hundred three".