79289221 has 8 divisors (see below), whose sum is σ = 86601600. Its totient is φ = 71994240.

The previous prime is 79289209. The next prime is 79289233. The reversal of 79289221 is 12298297.

It is an interprime number because it is at equal distance from previous prime (79289209) and next prime (79289233).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 79289221 - 2⁹ = 79288709 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 (79289621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6340 + ... + 14098.

It is an arithmetic number, because the mean of its divisors is an integer number (10825200).

Almost surely, 2^79289221 is an apocalyptic number.

It is an amenable number.

79289221 is a deficient number, since it is larger than the sum of its proper divisors (7312379).

79289221 is a wasteful number, since it uses less digits than its factorization.

79289221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8699.

The product of its digits is 36288, while the sum is 40.

The square root of 79289221 is about 8904.4495057247. The cubic root of 79289221 is about 429.6070341736.

The spelling of 79289221 in words is "seventy-nine million, two hundred eighty-nine thousand, two hundred twenty-one".