9985187 has 2 divisors, whose sum is σ = 9985188. Its totient is φ = 9985186.

The previous prime is 9985169. The next prime is 9985207. The reversal of 9985187 is 7815899.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9985187 - 2⁶ = 9985123 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (9984187) 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 as a sum of consecutive naturals, namely, 4992593 + 4992594.

It is an arithmetic number, because the mean of its divisors is an integer number (4992594).

Almost surely, 2^9985187 is an apocalyptic number.

9985187 is a deficient number, since it is larger than the sum of its proper divisors (1).

9985187 is an equidigital number, since it uses as much as digits as its factorization.

9985187 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 181440, while the sum is 47.

The square root of 9985187 is about 3159.9346512230. The cubic root of 9985187 is about 215.3370376301.

The spelling of 9985187 in words is "nine million, nine hundred eighty-five thousand, one hundred eighty-seven".