6434209 has 2 divisors, whose sum is σ = 6434210. Its totient is φ = 6434208.

The previous prime is 6434191. The next prime is 6434251. The reversal of 6434209 is 9024346.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3294225 + 3139984 = 1815^2 + 1772^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6434209 is a prime.

It is not a weakly prime, because it can be changed into another prime (6434299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3217104 + 3217105.

It is an arithmetic number, because the mean of its divisors is an integer number (3217105).

Almost surely, 2^6434209 is an apocalyptic number.

It is an amenable number.

6434209 is a deficient number, since it is larger than the sum of its proper divisors (1).

6434209 is an equidigital number, since it uses as much as digits as its factorization.

6434209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 6434209 is about 2536.5742646333. The cubic root of 6434209 is about 185.9937659297.

The spelling of 6434209 in words is "six million, four hundred thirty-four thousand, two hundred nine".