9438409 has 4 divisors (see below), whose sum is σ = 9470916. Its totient is φ = 9405904.

The previous prime is 9438397. The next prime is 9438431. The reversal of 9438409 is 9048349.

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

It can be written as a sum of positive squares in 2 ways, for example, as 8880400 + 558009 = 2980^2 + 747^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9438409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9438479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15814 + ... + 16399.

It is an arithmetic number, because the mean of its divisors is an integer number (2367729).

Almost surely, 2^9438409 is an apocalyptic number.

It is an amenable number.

9438409 is a deficient number, since it is larger than the sum of its proper divisors (32507).

9438409 is a wasteful number, since it uses less digits than its factorization.

9438409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32506.

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 9438409 is about 3072.1993750406. The cubic root of 9438409 is about 211.3324871898.

It can be divided in two parts, 94 and 38409, that added together give a triangular number (38503 = T₂₇₇).

The spelling of 9438409 in words is "nine million, four hundred thirty-eight thousand, four hundred nine".