79723 has 6 divisors (see below), whose sum is σ = 92796. Its totient is φ = 68292.

The previous prime is 79699. The next prime is 79757. The reversal of 79723 is 32797.

It is a happy number.

It is not a de Polignac number, because 79723 - 2⁵ = 79691 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 79691 and 79700.

It is not an unprimeable number, because it can be changed into a prime (79423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 765 + ... + 862.

It is an arithmetic number, because the mean of its divisors is an integer number (15466).

2⁷⁹⁷²³ is an apocalyptic number.

79723 is a deficient number, since it is larger than the sum of its proper divisors (13073).

79723 is a wasteful number, since it uses less digits than its factorization.

79723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1641 (or 1634 counting only the distinct ones).

The product of its digits is 2646, while the sum is 28.

The square root of 79723 is about 282.3526164214. The cubic root of 79723 is about 43.0389047574.

Adding to 79723 its product of digits (2646), we get a square (82369 = 287²).

Subtracting from 79723 its product of digits (2646), we obtain a palindrome (77077).

It can be divided in two parts, 797 and 23, that added together give a triangular number (820 = T₄₀).

The spelling of 79723 in words is "seventy-nine thousand, seven hundred twenty-three".