9985123 has 2 divisors, whose sum is σ = 9985124. Its totient is φ = 9985122.

The previous prime is 9985111. The next prime is 9985139. The reversal of 9985123 is 3215899.

It is a weak prime.

It is an emirp because it is prime and its reverse (3215899) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9985123 - 2⁵ = 9985091 is a prime.

9985123 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (9980123) 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, 4992561 + 4992562.

It is an arithmetic number, because the mean of its divisors is an integer number (4992562).

Almost surely, 2^9985123 is an apocalyptic number.

9985123 is a deficient number, since it is larger than the sum of its proper divisors (1).

9985123 is an equidigital number, since it uses as much as digits as its factorization.

9985123 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19440, while the sum is 37.

The square root of 9985123 is about 3159.9245244151. The cubic root of 9985123 is about 215.3365775619.

The spelling of 9985123 in words is "nine million, nine hundred eighty-five thousand, one hundred twenty-three".