6405679 has 8 divisors (see below), whose sum is σ = 7706240. Its totient is φ = 5201496.

The previous prime is 6405653. The next prime is 6405701. The reversal of 6405679 is 9765046.

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 6405679 - 2⁵ = 6405647 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6405629) 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, 23949 + ... + 24214.

It is an arithmetic number, because the mean of its divisors is an integer number (963280).

Almost surely, 2^6405679 is an apocalyptic number.

6405679 is a deficient number, since it is larger than the sum of its proper divisors (1300561).

6405679 is a wasteful number, since it uses less digits than its factorization.

6405679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48189.

The product of its (nonzero) digits is 45360, while the sum is 37.

The square root of 6405679 is about 2530.9442901810. The cubic root of 6405679 is about 185.7184529073.

The spelling of 6405679 in words is "six million, four hundred five thousand, six hundred seventy-nine".