99686 has 4 divisors (see below), whose sum is σ = 149532. Its totient is φ = 49842.

The previous prime is 99679. The next prime is 99689. The reversal of 99686 is 68699.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99689) by changing a digit.

99686 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24920 + ... + 24923.

It is an arithmetic number, because the mean of its divisors is an integer number (37383).

2⁹⁹⁶⁸⁶ is an apocalyptic number.

99686 is a deficient number, since it is larger than the sum of its proper divisors (49846).

99686 is a wasteful number, since it uses less digits than its factorization.

99686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49845.

The product of its digits is 23328, while the sum is 38.

The square root of 99686 is about 315.7308980762. The cubic root of 99686 is about 46.3672554350.

The spelling of 99686 in words is "ninety-nine thousand, six hundred eighty-six".