79139099827 has 4 divisors (see below), whose sum is σ = 81069321816. Its totient is φ = 77208877840.

The previous prime is 79139099807. The next prime is 79139099863. The reversal of 79139099827 is 72899093197.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 72899093197 = 7 ⋅10414156171.

It is a cyclic number.

It is not a de Polignac number, because 79139099827 - 2¹⁹ = 79138575539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79139099807) 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 3 ways as a sum of consecutive naturals, for example, 965110933 + ... + 965111014.

It is an arithmetic number, because the mean of its divisors is an integer number (20267330454).

Almost surely, 2^79139099827 is an apocalyptic number.

79139099827 is a deficient number, since it is larger than the sum of its proper divisors (1930221989).

79139099827 is a wasteful number, since it uses less digits than its factorization.

79139099827 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1930221988.

The product of its (nonzero) digits is 15431472, while the sum is 64.

The spelling of 79139099827 in words is "seventy-nine billion, one hundred thirty-nine million, ninety-nine thousand, eight hundred twenty-seven".