79454221 has 16 divisors (see below), whose sum is σ = 99279360. Its totient is φ = 61775280.

The previous prime is 79454203. The next prime is 79454267. The reversal of 79454221 is 12245497.

It is not a de Polignac number, because 79454221 - 2⁵ = 79454189 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 (79454021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46830 + ... + 48496.

It is an arithmetic number, because the mean of its divisors is an integer number (6204960).

Almost surely, 2^79454221 is an apocalyptic number.

It is an amenable number.

79454221 is a deficient number, since it is larger than the sum of its proper divisors (19825139).

79454221 is a wasteful number, since it uses less digits than its factorization.

79454221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2304.

The product of its digits is 20160, while the sum is 34.

The square root of 79454221 is about 8913.7097215469. The cubic root of 79454221 is about 429.9048302090.

The spelling of 79454221 in words is "seventy-nine million, four hundred fifty-four thousand, two hundred twenty-one".