79346221 has 2 divisors, whose sum is σ = 79346222. Its totient is φ = 79346220.

The previous prime is 79346219. The next prime is 79346231. The reversal of 79346221 is 12264397.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43705321 + 35640900 = 6611^2 + 5970^2 .

It is an emirp because it is prime and its reverse (12264397) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 79346221 - 2¹ = 79346219 is a prime.

Together with 79346219, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79346231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39673110 + 39673111.

It is an arithmetic number, because the mean of its divisors is an integer number (39673111).

Almost surely, 2^79346221 is an apocalyptic number.

It is an amenable number.

79346221 is a deficient number, since it is larger than the sum of its proper divisors (1).

79346221 is an equidigital number, since it uses as much as digits as its factorization.

79346221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18144, while the sum is 34.

The square root of 79346221 is about 8907.6495777506. The cubic root of 79346221 is about 429.7099558362.

The spelling of 79346221 in words is "seventy-nine million, three hundred forty-six thousand, two hundred twenty-one".