6399429 has 16 divisors (see below), whose sum is σ = 9097920. Its totient is φ = 3987200.

The previous prime is 6399427. The next prime is 6399433. The reversal of 6399429 is 9249936.

It is a cyclic number.

It is not a de Polignac number, because 6399429 - 2¹ = 6399427 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6399427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8779 + ... + 9479.

It is an arithmetic number, because the mean of its divisors is an integer number (568620).

Almost surely, 2^6399429 is an apocalyptic number.

It is an amenable number.

6399429 is a deficient number, since it is larger than the sum of its proper divisors (2698491).

6399429 is a wasteful number, since it uses less digits than its factorization.

6399429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 900.

The product of its digits is 104976, while the sum is 42.

The square root of 6399429 is about 2529.7092718334. The cubic root of 6399429 is about 185.6580316236.

The spelling of 6399429 in words is "six million, three hundred ninety-nine thousand, four hundred twenty-nine".