79523 has 4 divisors (see below), whose sum is σ = 80088. Its totient is φ = 78960.

The previous prime is 79493. The next prime is 79531. The reversal of 79523 is 32597.

It is a Cunningham number, because it is equal to 282²-1.

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, and also an emirpimes, since its reverse is a distinct semiprime: 32597 = 37 ⋅881.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79523 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 79492 and 79501.

It is not an unprimeable number, because it can be changed into a prime (79423) 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, 140 + ... + 422.

It is an arithmetic number, because the mean of its divisors is an integer number (20022).

2⁷⁹⁵²³ is an apocalyptic number.

79523 is a deficient number, since it is larger than the sum of its proper divisors (565).

79523 is a wasteful number, since it uses less digits than its factorization.

79523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 564.

The product of its digits is 1890, while the sum is 26.

The square root of 79523 is about 281.9982269448. The cubic root of 79523 is about 43.0028842486.

Subtracting from 79523 its sum of digits (26), we obtain a palindrome (79497).

It can be divided in two parts, 795 and 23, that added together give a palindrome (818).

The spelling of 79523 in words is "seventy-nine thousand, five hundred twenty-three".