99999117 has 28 divisors (see below), whose sum is σ = 158769180. Its totient is φ = 62736768.

The previous prime is 99999113. The next prime is 99999131. The reversal of 99999117 is 71199999.

It can be written as a sum of positive squares in 2 ways, for example, as 28579716 + 71419401 = 5346^2 + 8451^2 .

It is not a de Polignac number, because 99999117 - 2² = 99999113 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99999113) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 8359 + ... + 16427.

Almost surely, 2^99999117 is an apocalyptic number.

It is an amenable number.

99999117 is a deficient number, since it is larger than the sum of its proper divisors (58770063).

99999117 is an equidigital number, since it uses as much as digits as its factorization.

99999117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8104 (or 8089 counting only the distinct ones).

The product of its digits is 413343, while the sum is 54.

The square root of 99999117 is about 9999.9558499025. The cubic root of 99999117 is about 464.1575171829.

The spelling of 99999117 in words is "ninety-nine million, nine hundred ninety-nine thousand, one hundred seventeen".