9999115 has 16 divisors (see below), whose sum is σ = 13844160. Its totient is φ = 6791040.

The previous prime is 9999083. The next prime is 9999161. The reversal of 9999115 is 5119999.

It is not a de Polignac number, because 9999115 - 2⁵ = 9999083 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2505 + ... + 5125.

It is an arithmetic number, because the mean of its divisors is an integer number (865260).

Almost surely, 2^9999115 is an apocalyptic number.

9999115 is a deficient number, since it is larger than the sum of its proper divisors (3845045).

9999115 is a wasteful number, since it uses less digits than its factorization.

9999115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2742.

The product of its digits is 32805, while the sum is 43.

The square root of 9999115 is about 3162.1377262858. The cubic root of 9999115 is about 215.4371132334.

The spelling of 9999115 in words is "nine million, nine hundred ninety-nine thousand, one hundred fifteen".