79877 has 4 divisors (see below), whose sum is σ = 91296. Its totient is φ = 68460.

The previous prime is 79873. The next prime is 79889. The reversal of 79877 is 77897.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 77897 = 61 ⋅1277.

It is not a de Polignac number, because 79877 - 2² = 79873 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 79877.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79873) 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, 5699 + ... + 5712.

It is an arithmetic number, because the mean of its divisors is an integer number (22824).

2⁷⁹⁸⁷⁷ is an apocalyptic number.

It is an amenable number.

79877 is a deficient number, since it is larger than the sum of its proper divisors (11419).

79877 is a wasteful number, since it uses less digits than its factorization.

79877 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11418.

The product of its digits is 24696, while the sum is 38.

The square root of 79877 is about 282.6251934984. The cubic root of 79877 is about 43.0665995179.

The spelling of 79877 in words is "seventy-nine thousand, eight hundred seventy-seven".