6449679947 has 8 divisors (see below), whose sum is σ = 6631380672. Its totient is φ = 6269140800.

The previous prime is 6449679923. The next prime is 6449679991. The reversal of 6449679947 is 7499769446.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6449679947 - 2¹⁰ = 6449678923 is a prime.

It is a super-3 number, since 3×6449679947³ (a number of 30 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (6449679347) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 279128 + ... + 301349.

It is an arithmetic number, because the mean of its divisors is an integer number (828922584).

Almost surely, 2^6449679947 is an apocalyptic number.

6449679947 is a deficient number, since it is larger than the sum of its proper divisors (181700725).

6449679947 is a wasteful number, since it uses less digits than its factorization.

6449679947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 580789.

The product of its digits is 82301184, while the sum is 65.

The square root of 6449679947 is about 80309.8994333824. The cubic root of 6449679947 is about 1861.4271956547.

The spelling of 6449679947 in words is "six billion, four hundred forty-nine million, six hundred seventy-nine thousand, nine hundred forty-seven".