79911 has 12 divisors (see below), whose sum is σ = 124488. Its totient is φ = 49104.

The previous prime is 79907. The next prime is 79939. The reversal of 79911 is 11997.

It is not a de Polignac number, because 79911 - 2² = 79907 is a prime.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79901) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 225 + ... + 458.

It is an arithmetic number, because the mean of its divisors is an integer number (10374).

2⁷⁹⁹¹¹ is an apocalyptic number.

79911 is a deficient number, since it is larger than the sum of its proper divisors (44577).

79911 is a wasteful number, since it uses less digits than its factorization.

79911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 702 (or 699 counting only the distinct ones).

The product of its digits is 567, while the sum is 27.

The square root of 79911 is about 282.6853374337. The cubic root of 79911 is about 43.0727091476.

It can be divided in two parts, 79 and 911, that added together give a triangular number (990 = T₄₄).

The spelling of 79911 in words is "seventy-nine thousand, nine hundred eleven".