79913 has 4 divisors (see below), whose sum is σ = 80580. Its totient is φ = 79248.

The previous prime is 79907. The next prime is 79939. The reversal of 79913 is 31997.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 44944 + 34969 = 212^2 + 187^2 .

It is a cyclic number.

It is not a de Polignac number, because 79913 - 2⁸ = 79657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79903) 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 3 ways as a sum of consecutive naturals, for example, 98 + ... + 411.

It is an arithmetic number, because the mean of its divisors is an integer number (20145).

2⁷⁹⁹¹³ is an apocalyptic number.

It is an amenable number.

79913 is a deficient number, since it is larger than the sum of its proper divisors (667).

79913 is a wasteful number, since it uses less digits than its factorization.

79913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 666.

The product of its digits is 1701, while the sum is 29.

The square root of 79913 is about 282.6888749137. The cubic root of 79913 is about 43.0730684836.

It can be divided in two parts, 79 and 913, that multiplied together give a palindrome (72127).

The spelling of 79913 in words is "seventy-nine thousand, nine hundred thirteen".