9719985 has 16 divisors (see below), whose sum is σ = 16966080. Its totient is φ = 4712640.

The previous prime is 9719981. The next prime is 9719989. The reversal of 9719985 is 5899179.

9719985 is digitally balanced in base 3, 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 (9719981) and next prime (9719989).

It is not a de Polignac number, because 9719985 - 2² = 9719981 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9719981) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29290 + ... + 29619.

It is an arithmetic number, because the mean of its divisors is an integer number (1060380).

Almost surely, 2^9719985 is an apocalyptic number.

It is an amenable number.

9719985 is a deficient number, since it is larger than the sum of its proper divisors (7246095).

9719985 is a wasteful number, since it uses less digits than its factorization.

9719985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58928.

The product of its digits is 204120, while the sum is 48.

The square root of 9719985 is about 3117.6890479969. The cubic root of 9719985 is about 213.4134884887.

The spelling of 9719985 in words is "nine million, seven hundred nineteen thousand, nine hundred eighty-five".