99869 has 8 divisors (see below), whose sum is σ = 124608. Its totient is φ = 77760.

The previous prime is 99859. The next prime is 99871. The reversal of 99869 is 96899.

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

It is a cyclic number.

It is not a de Polignac number, because 99869 - 2¹² = 95773 is a prime.

It is a super-2 number, since 2×99869² = 19947634322, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99809) 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, 572 + ... + 725.

It is an arithmetic number, because the mean of its divisors is an integer number (15576).

2⁹⁹⁸⁶⁹ is an apocalyptic number.

It is an amenable number.

99869 is a deficient number, since it is larger than the sum of its proper divisors (24739).

99869 is a wasteful number, since it uses less digits than its factorization.

99869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1315.

The product of its digits is 34992, while the sum is 41.

The square root of 99869 is about 316.0205689508. The cubic root of 99869 is about 46.3956112080.

The spelling of 99869 in words is "ninety-nine thousand, eight hundred sixty-nine".