6503649 has 4 divisors (see below), whose sum is σ = 8671536. Its totient is φ = 4335764.

The previous prime is 6503647. The next prime is 6503663. The reversal of 6503649 is 9463056.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6503649 - 2¹ = 6503647 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (6503647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1083939 + ... + 1083944.

It is an arithmetic number, because the mean of its divisors is an integer number (2167884).

Almost surely, 2^6503649 is an apocalyptic number.

It is an amenable number.

6503649 is a deficient number, since it is larger than the sum of its proper divisors (2167887).

6503649 is a wasteful number, since it uses less digits than its factorization.

6503649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2167886.

The product of its (nonzero) digits is 19440, while the sum is 33.

The square root of 6503649 is about 2550.2252841661. The cubic root of 6503649 is about 186.6604742135.

The spelling of 6503649 in words is "six million, five hundred three thousand, six hundred forty-nine".