9993209 has 2 divisors, whose sum is σ = 9993210.
Its totient is φ = 9993208.
The previous prime is 9993173. The next prime is 9993223. The reversal of 9993209 is 9023999.
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 9320809 + 672400 = 3053^2 + 820^2
It is an emirp because it is prime and its reverse (9023999) is a distict prime.
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-9993209 is a prime.
It is a super-2 number, since 2×99932092 = 199728452235362, which contains 22 as substring.
It is a Sophie Germain prime.
It is a Chen prime.
It is a Curzon number.
It is not a weakly prime, because it can be changed into another prime (9993239) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4996604 + 4996605.
It is an arithmetic number, because the mean of its divisors is an integer number (4996605).
Almost surely, 29993209 is an apocalyptic number.
It is an amenable number.
9993209 is a deficient number, since it is larger than the sum of its proper divisors (1).
9993209 is an equidigital number, since it uses as much as digits as its factorization.
9993209 is an odious number, because the sum of its binary digits is odd.
The product of its (nonzero) digits is 39366, while the sum is 41.
The square root of 9993209 is about 3161.2037264308.
The cubic root of 9993209 is about 215.3946887394.
The spelling of 9993209 in words is "nine million, nine hundred ninety-three thousand, two hundred nine".