97356821 has 2 divisors, whose sum is σ = 97356822. Its totient is φ = 97356820.

The previous prime is 97356767. The next prime is 97356871. The reversal of 97356821 is 12865379.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 79834225 + 17522596 = 8935^2 + 4186^2 .

It is a cyclic number.

It is not a de Polignac number, because 97356821 - 2⁶ = 97356757 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is equal to p_5617859 and since 97356821 and 5617859 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97356871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48678410 + 48678411.

It is an arithmetic number, because the mean of its divisors is an integer number (48678411).

Almost surely, 2^97356821 is an apocalyptic number.

It is an amenable number.

97356821 is a deficient number, since it is larger than the sum of its proper divisors (1).

97356821 is an equidigital number, since it uses as much as digits as its factorization.

97356821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 90720, while the sum is 41.

The square root of 97356821 is about 9866.9560149015. The cubic root of 97356821 is about 460.0327969685.

The spelling of 97356821 in words is "ninety-seven million, three hundred fifty-six thousand, eight hundred twenty-one".