9649909 has 2 divisors, whose sum is σ = 9649910. Its totient is φ = 9649908.

The previous prime is 9649901. The next prime is 9649919. The reversal of 9649909 is 9099469.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4906225 + 4743684 = 2215^2 + 2178^2 .

It is an emirp because it is prime and its reverse (9099469) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9649909 - 2³ = 9649901 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9649901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4824954 + 4824955.

It is an arithmetic number, because the mean of its divisors is an integer number (4824955).

Almost surely, 2^9649909 is an apocalyptic number.

It is an amenable number.

9649909 is a deficient number, since it is larger than the sum of its proper divisors (1).

9649909 is an equidigital number, since it uses as much as digits as its factorization.

9649909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 157464, while the sum is 46.

The square root of 9649909 is about 3106.4302663990. The cubic root of 9649909 is about 212.8993845439.

It can be divided in two parts, 96 and 49909, that added together give a palindrome (50005).

The spelling of 9649909 in words is "nine million, six hundred forty-nine thousand, nine hundred nine".