79845 has 8 divisors (see below), whose sum is σ = 127776. Its totient is φ = 42576.

The previous prime is 79843. The next prime is 79847. The reversal of 79845 is 54897.

It is an interprime number because it is at equal distance from previous prime (79843) and next prime (79847).

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

It is not a de Polignac number, because 79845 - 2¹ = 79843 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2647 + ... + 2676.

It is an arithmetic number, because the mean of its divisors is an integer number (15972).

2⁷⁹⁸⁴⁵ is an apocalyptic number.

It is an amenable number.

79845 is a deficient number, since it is larger than the sum of its proper divisors (47931).

79845 is a wasteful number, since it uses less digits than its factorization.

79845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5331.

The product of its digits is 10080, while the sum is 33.

The square root of 79845 is about 282.5685757476. The cubic root of 79845 is about 43.0608476942.

The spelling of 79845 in words is "seventy-nine thousand, eight hundred forty-five".