79999827 has 4 divisors (see below), whose sum is σ = 106666440. Its totient is φ = 53333216.

The previous prime is 79999817. The next prime is 79999831. The reversal of 79999827 is 72899997.

It is a happy number.

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 79999827 - 2⁶ = 79999763 is a prime.

It is not an unprimeable number, because it can be changed into a prime (79999817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13333302 + ... + 13333307.

It is an arithmetic number, because the mean of its divisors is an integer number (26666610).

Almost surely, 2^79999827 is an apocalyptic number.

79999827 is a deficient number, since it is larger than the sum of its proper divisors (26666613).

79999827 is a wasteful number, since it uses less digits than its factorization.

79999827 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26666612.

The product of its digits is 5143824, while the sum is 60.

The square root of 79999827 is about 8944.2622389999. The cubic root of 79999827 is about 430.8866274085.

The spelling of 79999827 in words is "seventy-nine million, nine hundred ninety-nine thousand, eight hundred twenty-seven".