99867 has 4 divisors (see below), whose sum is σ = 133160. Its totient is φ = 66576.

The previous prime is 99859. The next prime is 99871. The reversal of 99867 is 76899.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 76899 = 3 ⋅25633.

It is not a de Polignac number, because 99867 - 2³ = 99859 is a prime.

It is an Ulam number.

It is a D-number.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 99867.

It is not an unprimeable number, because it can be changed into a prime (99817) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16642 + ... + 16647.

It is an arithmetic number, because the mean of its divisors is an integer number (33290).

2⁹⁹⁸⁶⁷ is an apocalyptic number.

99867 is a deficient number, since it is larger than the sum of its proper divisors (33293).

99867 is a wasteful number, since it uses less digits than its factorization.

99867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33292.

The product of its digits is 27216, while the sum is 39.

The square root of 99867 is about 316.0174045840. The cubic root of 99867 is about 46.3953014961.

It can be divided in two parts, 998 and 67, that multiplied together give a palindrome (66866).

The spelling of 99867 in words is "ninety-nine thousand, eight hundred sixty-seven".