79439803381 has 8 divisors (see below), whose sum is σ = 82378934144. Its totient is φ = 76542362640.

The previous prime is 79439803351. The next prime is 79439803409. The reversal of 79439803381 is 18330893497.

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 79439803381 - 2²⁹ = 78902932469 is a prime.

It is a super-2 number, since 2×79439803381² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79439803351) 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, 10418625 + ... + 10426246.

It is an arithmetic number, because the mean of its divisors is an integer number (10297366768).

Almost surely, 2^79439803381 is an apocalyptic number.

It is an amenable number.

79439803381 is a deficient number, since it is larger than the sum of its proper divisors (2939130763).

79439803381 is a wasteful number, since it uses less digits than its factorization.

79439803381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20845011.

The product of its (nonzero) digits is 3919104, while the sum is 55.

The spelling of 79439803381 in words is "seventy-nine billion, four hundred thirty-nine million, eight hundred three thousand, three hundred eighty-one".