72847 has 4 divisors (see below), whose sum is σ = 73696. Its totient is φ = 72000.

The previous prime is 72823. The next prime is 72859. The reversal of 72847 is 74827.

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 72847 - 2⁷ = 72719 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72817) 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, 279 + ... + 472.

It is an arithmetic number, because the mean of its divisors is an integer number (18424).

2⁷²⁸⁴⁷ is an apocalyptic number.

72847 is a deficient number, since it is larger than the sum of its proper divisors (849).

72847 is an equidigital number, since it uses as much as digits as its factorization.

72847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 848.

The product of its digits is 3136, while the sum is 28.

The square root of 72847 is about 269.9018340064. The cubic root of 72847 is about 41.7641734182.

It can be divided in two parts, 72 and 847, that added together give a palindrome (919).

The spelling of 72847 in words is "seventy-two thousand, eight hundred forty-seven".