649503 has 6 divisors (see below), whose sum is σ = 938184. Its totient is φ = 432996.

The previous prime is 649501. The next prime is 649507. The reversal of 649503 is 305946.

It is a happy number.

It is not a de Polignac number, because 649503 - 2¹ = 649501 is a prime.

649503 is a lucky number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 649503.

It is not an unprimeable number, because it can be changed into a prime (649501) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 36075 + ... + 36092.

It is an arithmetic number, because the mean of its divisors is an integer number (156364).

2⁶⁴⁹⁵⁰³ is an apocalyptic number.

649503 is a deficient number, since it is larger than the sum of its proper divisors (288681).

649503 is a wasteful number, since it uses less digits than its factorization.

649503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72173 (or 72170 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 649503 is about 805.9174895732. The cubic root of 649503 is about 86.6018269131.

The spelling of 649503 in words is "six hundred forty-nine thousand, five hundred three".