79805 has 8 divisors (see below), whose sum is σ = 104544. Its totient is φ = 58000.

The previous prime is 79801. The next prime is 79811. The reversal of 79805 is 50897.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 79805 - 2² = 79801 is a prime.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79801) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 671 + ... + 780.

It is an arithmetic number, because the mean of its divisors is an integer number (13068).

2⁷⁹⁸⁰⁵ is an apocalyptic number.

It is an amenable number.

79805 is a deficient number, since it is larger than the sum of its proper divisors (24739).

79805 is a wasteful number, since it uses less digits than its factorization.

79805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1467.

The product of its (nonzero) digits is 2520, while the sum is 29.

The square root of 79805 is about 282.4977876020. The cubic root of 79805 is about 43.0536557531.

It can be divided in two parts, 7 and 9805, that multiplied together give a triangular number (68635 = T₃₇₀).

The spelling of 79805 in words is "seventy-nine thousand, eight hundred five".