6438699 has 12 divisors (see below), whose sum is σ = 9847656. Its totient is φ = 4039872.

The previous prime is 6438697. The next prime is 6438721. The reversal of 6438699 is 9968346.

It is not a de Polignac number, because 6438699 - 2¹ = 6438697 is a prime.

6438699 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (6438697) 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 11 ways as a sum of consecutive naturals, for example, 20889 + ... + 21194.

It is an arithmetic number, because the mean of its divisors is an integer number (820638).

Almost surely, 2^6438699 is an apocalyptic number.

6438699 is a deficient number, since it is larger than the sum of its proper divisors (3408957).

6438699 is a wasteful number, since it uses less digits than its factorization.

6438699 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42106 (or 42103 counting only the distinct ones).

The product of its digits is 279936, while the sum is 45.

The square root of 6438699 is about 2537.4591622330. The cubic root of 6438699 is about 186.0370200333.

The spelling of 6438699 in words is "six million, four hundred thirty-eight thousand, six hundred ninety-nine".