79899 has 4 divisors (see below), whose sum is σ = 106536. Its totient is φ = 53264.

The previous prime is 79889. The next prime is 79901. The reversal of 79899 is 99897.

It is a happy number.

79899 is nontrivially palindromic in base 12.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 79899 - 2⁵ = 79867 is a prime.

It is an Ulam number.

It is a D-number.

79899 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 79899.

It is not an unprimeable number, because it can be changed into a prime (79829) 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, 13314 + ... + 13319.

It is an arithmetic number, because the mean of its divisors is an integer number (26634).

2⁷⁹⁸⁹⁹ is an apocalyptic number.

79899 is a deficient number, since it is larger than the sum of its proper divisors (26637).

79899 is a wasteful number, since it uses less digits than its factorization.

79899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26636.

The product of its digits is 40824, while the sum is 42.

The square root of 79899 is about 282.6641116237. The cubic root of 79899 is about 43.0705530056.

The spelling of 79899 in words is "seventy-nine thousand, eight hundred ninety-nine".