99686517 has 16 divisors (see below), whose sum is σ = 152541312. Its totient is φ = 56724480.

The previous prime is 99686479. The next prime is 99686519. The reversal of 99686517 is 71568699.

It is not a de Polignac number, because 99686517 - 2¹⁰ = 99685493 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 99686517.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99686519) 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, 4788 + ... + 14909.

It is an arithmetic number, because the mean of its divisors is an integer number (9533832).

Almost surely, 2^99686517 is an apocalyptic number.

It is an amenable number.

99686517 is a deficient number, since it is larger than the sum of its proper divisors (52854795).

99686517 is a wasteful number, since it uses less digits than its factorization.

99686517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19948.

The product of its digits is 816480, while the sum is 51.

The square root of 99686517 is about 9984.3135467592. The cubic root of 99686517 is about 463.6733559279.

The spelling of 99686517 in words is "ninety-nine million, six hundred eighty-six thousand, five hundred seventeen".