6449879 has 4 divisors (see below), whose sum is σ = 6483840. Its totient is φ = 6415920.

The previous prime is 6449837. The next prime is 6449881. The reversal of 6449879 is 9789446.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6449879 is a prime.

It is a super-2 number, since 2×6449879² = 83201878229282, 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 (6449899) 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, 16694 + ... + 17075.

It is an arithmetic number, because the mean of its divisors is an integer number (1620960).

Almost surely, 2^6449879 is an apocalyptic number.

6449879 is a deficient number, since it is larger than the sum of its proper divisors (33961).

6449879 is a wasteful number, since it uses less digits than its factorization.

6449879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33960.

The product of its digits is 435456, while the sum is 47.

The square root of 6449879 is about 2539.6611978766. The cubic root of 6449879 is about 186.1446344866.

The spelling of 6449879 in words is "six million, four hundred forty-nine thousand, eight hundred seventy-nine".