9985211 has 4 divisors (see below), whose sum is σ = 10134312.
Its totient is φ = 9836112.
The previous prime is 9985207. The next prime is 9985229. The reversal of 9985211 is 1125899.
It is a semiprime because it is the product of two primes.
It is a cyclic number.
It is not a de Polignac number, because 9985211 - 22 = 9985207 is a prime.
It is a Duffinian number.
It is a nialpdrome in base 10.
It is not an unprimeable number, because it can be changed into a prime (9985231) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (13) of ones.
It is an upside-down number.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74450 + ... + 74583.
It is an arithmetic number, because the mean of its divisors is an integer number (2533578).
Almost surely, 29985211 is an apocalyptic number.
9985211 is a deficient number, since it is larger than the sum of its proper divisors (149101).
9985211 is a wasteful number, since it uses less digits than its factorization.
9985211 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 149100.
The product of its digits is 6480, while the sum is 35.
The square root of 9985211 is about 3159.9384487676.
The cubic root of 9985211 is about 215.3372101551.
The spelling of 9985211 in words is "nine million, nine hundred eighty-five thousand, two hundred eleven".