4238909 has 4 divisors (see below), whose sum is σ = 4375680. Its totient is φ = 4102140.

The previous prime is 4238873. The next prime is 4238911. The reversal of 4238909 is 9098324.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4238909 is a prime.

It is a d-powerful number, because it can be written as 4¹¹ + 2¹³ + 3⁷ + 8⁵ + 9³ + 0 + 9³ .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4238929) 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 3 ways as a sum of consecutive naturals, for example, 68339 + ... + 68400.

It is an arithmetic number, because the mean of its divisors is an integer number (1093920).

Almost surely, 2^4238909 is an apocalyptic number.

It is an amenable number.

4238909 is a deficient number, since it is larger than the sum of its proper divisors (136771).

4238909 is a wasteful number, since it uses less digits than its factorization.

4238909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136770.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 4238909 is about 2058.8610929346. The cubic root of 4238909 is about 161.8395632591.

The spelling of 4238909 in words is "four million, two hundred thirty-eight thousand, nine hundred nine".