79917131279 has 8 divisors (see below), whose sum is σ = 83201399760. Its totient is φ = 76692038976.

The previous prime is 79917131233. The next prime is 79917131293. The reversal of 79917131279 is 97213171997.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79917131279 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79917121279) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14791289 + ... + 14796690.

It is an arithmetic number, because the mean of its divisors is an integer number (10400174970).

Almost surely, 2^79917131279 is an apocalyptic number.

79917131279 is a deficient number, since it is larger than the sum of its proper divisors (3284268481).

79917131279 is a wasteful number, since it uses less digits than its factorization.

79917131279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29588089.

The product of its digits is 1500282, while the sum is 56.

The spelling of 79917131279 in words is "seventy-nine billion, nine hundred seventeen million, one hundred thirty-one thousand, two hundred seventy-nine".