79885 has 8 divisors (see below), whose sum is σ = 103320. Its totient is φ = 58944.

The previous prime is 79873. The next prime is 79889. The reversal of 79885 is 58897.

It can be written as a sum of positive squares in 4 ways, for example, as 15876 + 64009 = 126^2 + 253^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 79885 - 2⁷ = 79757 is a prime.

It is a super-2 number, since 2×79885² = 12763226450, which contains 22 as substring.

It is an Ulam number.

It is a d-powerful number, because it can be written as 7 + 9³ + 8³ + 8³ + 5⁷ .

79885 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 550 + ... + 679.

It is an arithmetic number, because the mean of its divisors is an integer number (12915).

2⁷⁹⁸⁸⁵ is an apocalyptic number.

It is an amenable number.

79885 is a deficient number, since it is larger than the sum of its proper divisors (23435).

79885 is a wasteful number, since it uses less digits than its factorization.

79885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1247.

The product of its digits is 20160, while the sum is 37.

The square root of 79885 is about 282.6393461640. The cubic root of 79885 is about 43.0680372338.

The spelling of 79885 in words is "seventy-nine thousand, eight hundred eighty-five".