79447 has 4 divisors (see below), whose sum is σ = 81000. Its totient is φ = 77896.

The previous prime is 79433. The next prime is 79451. The reversal of 79447 is 74497.

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 79447 - 2⁷ = 79319 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an Ulam number.

It is a Duffinian number.

It is a zygodrome in base 3.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79427) 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, 697 + ... + 802.

It is an arithmetic number, because the mean of its divisors is an integer number (20250).

2⁷⁹⁴⁴⁷ is an apocalyptic number.

79447 is a deficient number, since it is larger than the sum of its proper divisors (1553).

79447 is a wasteful number, since it uses less digits than its factorization.

79447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1552.

The product of its digits is 7056, while the sum is 31.

The square root of 79447 is about 281.8634421134. The cubic root of 79447 is about 42.9891806203.

Subtracting from 79447 its reverse (74497), we obtain a triangular number (4950 = T₉₉).

It can be divided in two parts, 794 and 47, that added together give a square (841 = 29²).

The spelling of 79447 in words is "seventy-nine thousand, four hundred forty-seven".