79747 has 4 divisors (see below), whose sum is σ = 84456. Its totient is φ = 75040.

The previous prime is 79699. The next prime is 79757. The reversal of 79747 is 74797.

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

It is a cyclic number.

It is not a de Polignac number, because 79747 - 2¹¹ = 77699 is a prime.

It is not an unprimeable number, because it can be changed into a prime (79757) 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, 2329 + ... + 2362.

It is an arithmetic number, because the mean of its divisors is an integer number (21114).

2⁷⁹⁷⁴⁷ is an apocalyptic number.

79747 is a deficient number, since it is larger than the sum of its proper divisors (4709).

79747 is a wasteful number, since it uses less digits than its factorization.

79747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4708.

The product of its digits is 12348, while the sum is 34.

The square root of 79747 is about 282.3951132722. The cubic root of 79747 is about 43.0432231686.

Subtracting from 79747 its reverse (74797), we obtain a triangular number (4950 = T₉₉).

The spelling of 79747 in words is "seventy-nine thousand, seven hundred forty-seven".