9973209 has 8 divisors (see below), whose sum is σ = 13622112. Its totient is φ = 6486560.

The previous prime is 9973207. The next prime is 9973211. The reversal of 9973209 is 9023799.

9973209 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (9973207) and next prime (9973211).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 9973209 - 2¹ = 9973207 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (9973207) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40419 + ... + 40664.

It is an arithmetic number, because the mean of its divisors is an integer number (1702764).

Almost surely, 2^9973209 is an apocalyptic number.

It is an amenable number.

9973209 is a deficient number, since it is larger than the sum of its proper divisors (3648903).

9973209 is a wasteful number, since it uses less digits than its factorization.

9973209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81127.

The product of its (nonzero) digits is 30618, while the sum is 39.

The square root of 9973209 is about 3158.0387901354. The cubic root of 9973209 is about 215.2508987297.

The spelling of 9973209 in words is "nine million, nine hundred seventy-three thousand, two hundred nine".