6449903 has 2 divisors, whose sum is σ = 6449904. Its totient is φ = 6449902.

The previous prime is 6449899. The next prime is 6449909. The reversal of 6449903 is 3099446.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6449903 - 2² = 6449899 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6449909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3224951 + 3224952.

It is an arithmetic number, because the mean of its divisors is an integer number (3224952).

Almost surely, 2^6449903 is an apocalyptic number.

6449903 is a deficient number, since it is larger than the sum of its proper divisors (1).

6449903 is an equidigital number, since it uses as much as digits as its factorization.

6449903 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23328, while the sum is 35.

The square root of 6449903 is about 2539.6659229119. The cubic root of 6449903 is about 186.1448653677.

The spelling of 6449903 in words is "six million, four hundred forty-nine thousand, nine hundred three".