79917823 has 8 divisors (see below), whose sum is σ = 82807200. Its totient is φ = 77037408.

The previous prime is 79917811. The next prime is 79917829. The reversal of 79917823 is 32871997.

It is a happy number.

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 79917823 - 2⁹ = 79917311 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 (79917829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19693 + ... + 23401.

It is an arithmetic number, because the mean of its divisors is an integer number (10350900).

Almost surely, 2^79917823 is an apocalyptic number.

79917823 is a deficient number, since it is larger than the sum of its proper divisors (2889377).

79917823 is a wasteful number, since it uses less digits than its factorization.

79917823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4481.

The product of its digits is 190512, while the sum is 46.

The square root of 79917823 is about 8939.6768957273. The cubic root of 79917823 is about 430.7393499771.

The spelling of 79917823 in words is "seventy-nine million, nine hundred seventeen thousand, eight hundred twenty-three".