97221730841 has 2 divisors, whose sum is σ = 97221730842. Its totient is φ = 97221730840.

The previous prime is 97221730813. The next prime is 97221730843. The reversal of 97221730841 is 14803712279.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 94620220816 + 2601510025 = 307604^2 + 51005^2 .

It is an emirp because it is prime and its reverse (14803712279) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-97221730841 is a prime.

Together with 97221730843, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 97221730792 and 97221730801.

It is not a weakly prime, because it can be changed into another prime (97221730843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48610865420 + 48610865421.

It is an arithmetic number, because the mean of its divisors is an integer number (48610865421).

Almost surely, 2^97221730841 is an apocalyptic number.

It is an amenable number.

97221730841 is a deficient number, since it is larger than the sum of its proper divisors (1).

97221730841 is an equidigital number, since it uses as much as digits as its factorization.

97221730841 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 169344, while the sum is 44.

The spelling of 97221730841 in words is "ninety-seven billion, two hundred twenty-one million, seven hundred thirty thousand, eight hundred forty-one".