9949209 has 4 divisors (see below), whose sum is σ = 13265616. Its totient is φ = 6632804.

The previous prime is 9949169. The next prime is 9949231. The reversal of 9949209 is 9029499.

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 not a de Polignac number, because 9949209 - 2⁷ = 9949081 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9949249) 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, 1658199 + ... + 1658204.

It is an arithmetic number, because the mean of its divisors is an integer number (3316404).

Almost surely, 2^9949209 is an apocalyptic number.

It is an amenable number.

9949209 is a deficient number, since it is larger than the sum of its proper divisors (3316407).

9949209 is a wasteful number, since it uses less digits than its factorization.

9949209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3316406.

The product of its (nonzero) digits is 52488, while the sum is 42.

The square root of 9949209 is about 3154.2366746964. The cubic root of 9949209 is about 215.0780967413.

The spelling of 9949209 in words is "nine million, nine hundred forty-nine thousand, two hundred nine".