6449993 has 4 divisors (see below), whose sum is σ = 7036368. Its totient is φ = 5863620.

The previous prime is 6449923. The next prime is 6450007. The reversal of 6449993 is 3999446.

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 6449993 - 2¹⁸ = 6187849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6449903) 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, 293171 + ... + 293192.

It is an arithmetic number, because the mean of its divisors is an integer number (1759092).

Almost surely, 2^6449993 is an apocalyptic number.

It is an amenable number.

6449993 is a deficient number, since it is larger than the sum of its proper divisors (586375).

6449993 is a wasteful number, since it uses less digits than its factorization.

6449993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 586374.

The product of its digits is 209952, while the sum is 44.

The square root of 6449993 is about 2539.6836417160. The cubic root of 6449993 is about 186.1457311668.

The spelling of 6449993 in words is "six million, four hundred forty-nine thousand, nine hundred ninety-three".