6449399 has 4 divisors (see below), whose sum is σ = 7035720. Its totient is φ = 5863080.

The previous prime is 6449363. The next prime is 6449413. The reversal of 6449399 is 9939446.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6449399 - 2¹⁶ = 6383863 is a prime.

It is a super-2 number, since 2×6449399² = 83189494922402, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6449309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 293144 + ... + 293165.

It is an arithmetic number, because the mean of its divisors is an integer number (1758930).

Almost surely, 2^6449399 is an apocalyptic number.

6449399 is a deficient number, since it is larger than the sum of its proper divisors (586321).

6449399 is a wasteful number, since it uses less digits than its factorization.

6449399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 586320.

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

The square root of 6449399 is about 2539.5666953242. The cubic root of 6449399 is about 186.1400167441.

The spelling of 6449399 in words is "six million, four hundred forty-nine thousand, three hundred ninety-nine".