9936409 has 4 divisors (see below), whose sum is σ = 11355904. Its totient is φ = 8516916.

The previous prime is 9936371. The next prime is 9936419. The reversal of 9936409 is 9046399.

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-9936409 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9936419) 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 3 ways as a sum of consecutive naturals, for example, 709737 + ... + 709750.

It is an arithmetic number, because the mean of its divisors is an integer number (2838976).

Almost surely, 2^9936409 is an apocalyptic number.

It is an amenable number.

9936409 is a deficient number, since it is larger than the sum of its proper divisors (1419495).

9936409 is a wasteful number, since it uses less digits than its factorization.

9936409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1419494.

The product of its (nonzero) digits is 52488, while the sum is 40.

The square root of 9936409 is about 3152.2070046239. The cubic root of 9936409 is about 214.9858220324.

The spelling of 9936409 in words is "nine million, nine hundred thirty-six thousand, four hundred nine".