79923543997 has 24 divisors (see below), whose sum is σ = 93049992000. Its totient is φ = 68359885440.

The previous prime is 79923543991. The next prime is 79923544073. The reversal of 79923543997 is 79934532997.

It is not a de Polignac number, because 79923543997 - 2²⁷ = 79789326269 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79923543991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8426904 + ... + 8436382.

It is an arithmetic number, because the mean of its divisors is an integer number (3877083000).

Almost surely, 2^79923543997 is an apocalyptic number.

It is an amenable number.

79923543997 is a deficient number, since it is larger than the sum of its proper divisors (13126448003).

79923543997 is a wasteful number, since it uses less digits than its factorization.

79923543997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13617 (or 13606 counting only the distinct ones).

The product of its digits is 115736040, while the sum is 67.

The spelling of 79923543997 in words is "seventy-nine billion, nine hundred twenty-three million, five hundred forty-three thousand, nine hundred ninety-seven".