79558 has 4 divisors (see below), whose sum is σ = 119340. Its totient is φ = 39778.

The previous prime is 79549. The next prime is 79559. The reversal of 79558 is 85597.

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

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79559) by changing a digit.

79558 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19888 + ... + 19891.

It is an arithmetic number, because the mean of its divisors is an integer number (29835).

2⁷⁹⁵⁵⁸ is an apocalyptic number.

79558 is a deficient number, since it is larger than the sum of its proper divisors (39782).

79558 is a wasteful number, since it uses less digits than its factorization.

79558 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39781.

The product of its digits is 12600, while the sum is 34.

The square root of 79558 is about 282.0602772458. The cubic root of 79558 is about 43.0091921938.

Subtracting from 79558 its sum of digits (34), we obtain a square (79524 = 282²).

The spelling of 79558 in words is "seventy-nine thousand, five hundred fifty-eight".