79172819231 has 8 divisors (see below), whose sum is σ = 86372417664. Its totient is φ = 71973565720.

The previous prime is 79172819227. The next prime is 79172819233. The reversal of 79172819231 is 13291827197.

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 79172819231 - 2² = 79172819227 is a prime.

It is a super-3 number, since 3×79172819231³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 79172819231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79172819233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 728240 + ... + 829866.

It is an arithmetic number, because the mean of its divisors is an integer number (10796552208).

Almost surely, 2^79172819231 is an apocalyptic number.

79172819231 is a deficient number, since it is larger than the sum of its proper divisors (7199598433).

79172819231 is a wasteful number, since it uses less digits than its factorization.

79172819231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172461.

The product of its digits is 381024, while the sum is 50.

The spelling of 79172819231 in words is "seventy-nine billion, one hundred seventy-two million, eight hundred nineteen thousand, two hundred thirty-one".