99999717 has 8 divisors (see below), whose sum is σ = 140350560. Its totient is φ = 63157680.

The previous prime is 99999703. The next prime is 99999721. The reversal of 99999717 is 71799999.

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

It is not a de Polignac number, because 99999717 - 2⁷ = 99999589 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99999787) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 877134 + ... + 877247.

It is an arithmetic number, because the mean of its divisors is an integer number (17543820).

Almost surely, 2^99999717 is an apocalyptic number.

It is an amenable number.

99999717 is a deficient number, since it is larger than the sum of its proper divisors (40350843).

99999717 is a wasteful number, since it uses less digits than its factorization.

99999717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1754403.

The product of its digits is 2893401, while the sum is 60.

The square root of 99999717 is about 9999.9858499900. The cubic root of 99999717 is about 464.1584455043.

The spelling of 99999717 in words is "ninety-nine million, nine hundred ninety-nine thousand, seven hundred seventeen".