6394687 has 4 divisors (see below), whose sum is σ = 6886600. Its totient is φ = 5902776.

The previous prime is 6394657. The next prime is 6394709. The reversal of 6394687 is 7864936.

It is a happy number.

6394687 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 6394687 - 2⁷ = 6394559 is a prime.

It is a d-powerful number, because it can be written as 6 + 3¹³ + 9⁷ + 4³ + 6 + 8³ + 7⁵ .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6394607) 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, 245937 + ... + 245962.

It is an arithmetic number, because the mean of its divisors is an integer number (1721650).

Almost surely, 2^6394687 is an apocalyptic number.

6394687 is a deficient number, since it is larger than the sum of its proper divisors (491913).

6394687 is a wasteful number, since it uses less digits than its factorization.

6394687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 491912.

The product of its digits is 217728, while the sum is 43.

The square root of 6394687 is about 2528.7718362873. The cubic root of 6394687 is about 185.6121625347.

The spelling of 6394687 in words is "six million, three hundred ninety-four thousand, six hundred eighty-seven".