79203203221 has 4 divisors (see below), whose sum is σ = 79203770272. Its totient is φ = 79202636172.

The previous prime is 79203203203. The next prime is 79203203243. The reversal of 79203203221 is 12230230297.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 79203203221 - 2²¹ = 79201106069 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 (79203203291) 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 in 3 ways as a sum of consecutive naturals, for example, 90166 + ... + 408088.

It is an arithmetic number, because the mean of its divisors is an integer number (19800942568).

Almost surely, 2^79203203221 is an apocalyptic number.

It is an amenable number.

79203203221 is a deficient number, since it is larger than the sum of its proper divisors (567051).

79203203221 is a wasteful number, since it uses less digits than its factorization.

79203203221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 567050.

The product of its (nonzero) digits is 9072, while the sum is 31.

The spelling of 79203203221 in words is "seventy-nine billion, two hundred three million, two hundred three thousand, two hundred twenty-one".