9641209 has 4 divisors (see below), whose sum is σ = 10060416. Its totient is φ = 9222004.

The previous prime is 9641173. The next prime is 9641221. The reversal of 9641209 is 9021469.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 9021469 = 1009 ⋅8941.

It is a cyclic number.

It is not a de Polignac number, because 9641209 - 2¹⁵ = 9608441 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9641299) 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, 209569 + ... + 209614.

It is an arithmetic number, because the mean of its divisors is an integer number (2515104).

Almost surely, 2^9641209 is an apocalyptic number.

It is an amenable number.

9641209 is a deficient number, since it is larger than the sum of its proper divisors (419207).

9641209 is a wasteful number, since it uses less digits than its factorization.

9641209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 419206.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 9641209 is about 3105.0296294883. The cubic root of 9641209 is about 212.8353845775.

The spelling of 9641209 in words is "nine million, six hundred forty-one thousand, two hundred nine".