6479689 has 4 divisors (see below), whose sum is σ = 6527124. Its totient is φ = 6432256.

The previous prime is 6479663. The next prime is 6479701. The reversal of 6479689 is 9869746.

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 2839225 + 3640464 = 1685^2 + 1908^2 .

It is a cyclic number.

It is not a de Polignac number, because 6479689 - 2⁵ = 6479657 is a prime.

It is a d-powerful number, because it can be written as 6³ + 4³ + 7⁵ + 9 + 6⁸ + 8 + 9⁷ .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6479609) 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, 23512 + ... + 23785.

It is an arithmetic number, because the mean of its divisors is an integer number (1631781).

Almost surely, 2^6479689 is an apocalyptic number.

It is an amenable number.

6479689 is a deficient number, since it is larger than the sum of its proper divisors (47435).

6479689 is a wasteful number, since it uses less digits than its factorization.

6479689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47434.

The product of its digits is 653184, while the sum is 49.

The square root of 6479689 is about 2545.5233253695. The cubic root of 6479689 is about 186.4309677499.

The spelling of 6479689 in words is "six million, four hundred seventy-nine thousand, six hundred eighty-nine".