79399394981 has 8 divisors (see below), whose sum is σ = 80020872000. Its totient is φ = 78779895040.

The previous prime is 79399394903. The next prime is 79399395073. The reversal of 79399394981 is 18949399397.

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-79399394981 is a prime.

It is a super-3 number, since 3×79399394981³ (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 congruent number.

It is not an unprimeable number, because it can be changed into a prime (79399396981) 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, 413585 + ... + 574326.

It is an arithmetic number, because the mean of its divisors is an integer number (10002609000).

Almost surely, 2^79399394981 is an apocalyptic number.

It is an amenable number.

79399394981 is a deficient number, since it is larger than the sum of its proper divisors (621477019).

79399394981 is a wasteful number, since it uses less digits than its factorization.

79399394981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 988539.

The product of its digits is 119042784, while the sum is 71.

The spelling of 79399394981 in words is "seventy-nine billion, three hundred ninety-nine million, three hundred ninety-four thousand, nine hundred eighty-one".