79879 has 6 divisors (see below), whose sum is σ = 84056. Its totient is φ = 75900.

The previous prime is 79873. The next prime is 79889. The reversal of 79879 is 97897.

79879 = 17² + 18² + ... + 62².

It is not a de Polignac number, because 79879 - 2⁵ = 79847 is a prime.

It is a Duffinian number.

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 pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 454 + ... + 604.

2⁷⁹⁸⁷⁹ is an apocalyptic number.

79879 is a deficient number, since it is larger than the sum of its proper divisors (4177).

79879 is a wasteful number, since it uses less digits than its factorization.

79879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197 (or 174 counting only the distinct ones).

The product of its digits is 31752, while the sum is 40.

The square root of 79879 is about 282.6287317312. The cubic root of 79879 is about 43.0669589558.

The spelling of 79879 in words is "seventy-nine thousand, eight hundred seventy-nine".