79827 has 16 divisors (see below), whose sum is σ = 120960. Its totient is φ = 46400.

The previous prime is 79823. The next prime is 79829. The reversal of 79827 is 72897.

It is a cyclic number.

It is not a de Polignac number, because 79827 - 2² = 79823 is a prime.

It is a super-3 number, since 3×79827³ = 1526056733346849, which contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (79823) 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 15 ways as a sum of consecutive naturals, for example, 1324 + ... + 1382.

It is an arithmetic number, because the mean of its divisors is an integer number (7560).

2⁷⁹⁸²⁷ is an apocalyptic number.

79827 is a deficient number, since it is larger than the sum of its proper divisors (41133).

79827 is a wasteful number, since it uses less digits than its factorization.

79827 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114.

The product of its digits is 7056, while the sum is 33.

The square root of 79827 is about 282.5367232768. The cubic root of 79827 is about 43.0576116180.

Subtracting from 79827 its product of digits (7056), we obtain a triangular number (72771 = T₃₈₁).

The spelling of 79827 in words is "seventy-nine thousand, eight hundred twenty-seven".