9999165 has 16 divisors (see below), whose sum is σ = 17453376. Its totient is φ = 4848000.

The previous prime is 9999163. The next prime is 9999167. The reversal of 9999165 is 5619999.

It is a happy number.

9999165 is digitally balanced in base 2 and base 4, because in such bases 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 (9999163) and next prime (9999167).

It is not a de Polignac number, because 9999165 - 2¹ = 9999163 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9999161) 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, 30136 + ... + 30465.

It is an arithmetic number, because the mean of its divisors is an integer number (1090836).

Almost surely, 2^9999165 is an apocalyptic number.

It is an amenable number.

9999165 is a deficient number, since it is larger than the sum of its proper divisors (7454211).

9999165 is a wasteful number, since it uses less digits than its factorization.

9999165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60620.

The product of its digits is 196830, while the sum is 48.

The square root of 9999165 is about 3162.1456323199. The cubic root of 9999165 is about 215.4374723264.

The spelling of 9999165 in words is "nine million, nine hundred ninety-nine thousand, one hundred sixty-five".