6479789 has 4 divisors (see below), whose sum is σ = 6703260. Its totient is φ = 6256320.

The previous prime is 6479747. The next prime is 6479791. The reversal of 6479789 is 9879746.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 5175625 + 1304164 = 2275^2 + 1142^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6479789 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6479729) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 111692 + ... + 111749.

It is an arithmetic number, because the mean of its divisors is an integer number (1675815).

Almost surely, 2^6479789 is an apocalyptic number.

It is an amenable number.

6479789 is a deficient number, since it is larger than the sum of its proper divisors (223471).

6479789 is a wasteful number, since it uses less digits than its factorization.

6479789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223470.

The product of its digits is 762048, while the sum is 50.

The square root of 6479789 is about 2545.5429676201. The cubic root of 6479789 is about 186.4319267980.

The spelling of 6479789 in words is "six million, four hundred seventy-nine thousand, seven hundred eighty-nine".