79929879794 has 4 divisors (see below), whose sum is σ = 119894819694. Its totient is φ = 39964939896.

The previous prime is 79929879791. The next prime is 79929879817. The reversal of 79929879794 is 49797892997.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 49797892997 = 139 ⋅358258223.

It can be written as a sum of positive squares in only one way, i.e., 51228437569 + 28701442225 = 226337^2 + 169415^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (79929879791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19982469947 + ... + 19982469950.

Almost surely, 2^79929879794 is an apocalyptic number.

79929879794 is a deficient number, since it is larger than the sum of its proper divisors (39964939900).

79929879794 is a wasteful number, since it uses less digits than its factorization.

79929879794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39964939899.

The product of its digits is 1296243648, while the sum is 80.

The spelling of 79929879794 in words is "seventy-nine billion, nine hundred twenty-nine million, eight hundred seventy-nine thousand, seven hundred ninety-four".