79991201223 has 12 divisors (see below), whose sum is σ = 116734010848. Its totient is φ = 52777699200.

The previous prime is 79991201219. The next prime is 79991201273. The reversal of 79991201223 is 32210219997.

It is not a de Polignac number, because 79991201223 - 2² = 79991201219 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 (79991201273) 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 11 ways as a sum of consecutive naturals, for example, 45813103 + ... + 45814848.

Almost surely, 2^79991201223 is an apocalyptic number.

79991201223 is a deficient number, since it is larger than the sum of its proper divisors (36742809625).

79991201223 is a wasteful number, since it uses less digits than its factorization.

79991201223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91628054 (or 91628051 counting only the distinct ones).

The product of its (nonzero) digits is 122472, while the sum is 45.

The spelling of 79991201223 in words is "seventy-nine billion, nine hundred ninety-one million, two hundred one thousand, two hundred twenty-three".