9999655 has 8 divisors (see below), whose sum is σ = 12705552. Its totient is φ = 7529088.

The previous prime is 9999653. The next prime is 9999659. The reversal of 9999655 is 5569999.

9999655 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 9999655 - 2¹ = 9999653 is a prime.

It is a Duffinian number.

9999655 is a lucky number.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9999653) 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 in 7 ways as a sum of consecutive naturals, for example, 58737 + ... + 58906.

It is an arithmetic number, because the mean of its divisors is an integer number (1588194).

Almost surely, 2^9999655 is an apocalyptic number.

9999655 is a deficient number, since it is larger than the sum of its proper divisors (2705897).

9999655 is a wasteful number, since it uses less digits than its factorization.

9999655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117665.

The product of its digits is 984150, while the sum is 52.

The square root of 9999655 is about 3162.2231104082. The cubic root of 9999655 is about 215.4409913748.

The spelling of 9999655 in words is "nine million, nine hundred ninety-nine thousand, six hundred fifty-five".