503649 has 12 divisors (see below), whose sum is σ = 735696. Its totient is φ = 331992.

The previous prime is 503647. The next prime is 503653. The reversal of 503649 is 946305.

It is a happy number.

It is not a de Polignac number, because 503649 - 2¹ = 503647 is a prime.

It is a Curzon number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 503649.

It is not an unprimeable number, because it can be changed into a prime (503647) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 702 + ... + 1224.

It is an arithmetic number, because the mean of its divisors is an integer number (61308).

2⁵⁰³⁶⁴⁹ is an apocalyptic number.

It is an amenable number.

503649 is a deficient number, since it is larger than the sum of its proper divisors (232047).

503649 is a wasteful number, since it uses less digits than its factorization.

503649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 636 (or 633 counting only the distinct ones).

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

The square root of 503649 is about 709.6823232968. The cubic root of 503649 is about 79.5626656734.

The spelling of 503649 in words is "five hundred three thousand, six hundred forty-nine".