79887 has 8 divisors (see below), whose sum is σ = 110080. Its totient is φ = 51480.

The previous prime is 79873. The next prime is 79889. The reversal of 79887 is 78897.

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

It is not a de Polignac number, because 79887 - 2⁶ = 79823 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79889) 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, 337 + ... + 522.

It is an arithmetic number, because the mean of its divisors is an integer number (13760).

2⁷⁹⁸⁸⁷ is an apocalyptic number.

79887 is a deficient number, since it is larger than the sum of its proper divisors (30193).

79887 is a wasteful number, since it uses less digits than its factorization.

79887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 893.

The product of its digits is 28224, while the sum is 39.

The square root of 79887 is about 282.6428842196. The cubic root of 79887 is about 43.0683966477.

Subtracting from 79887 its reverse (78897), we obtain a triangular number (990 = T₄₄).

The spelling of 79887 in words is "seventy-nine thousand, eight hundred eighty-seven".