97443221 has 2 divisors, whose sum is σ = 97443222. Its totient is φ = 97443220.

The previous prime is 97443211. The next prime is 97443239. The reversal of 97443221 is 12234479.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49984900 + 47458321 = 7070^2 + 6889^2 .

It is a cyclic number.

It is not a de Polignac number, because 97443221 - 2¹⁴ = 97426837 is a prime.

It is a Chen prime.

It is equal to p_5622575 and since 97443221 and 5622575 have the same sum of digits, it is a Honaker prime.

It is a nialpdrome in base 10.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97443211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48721610 + 48721611.

It is an arithmetic number, because the mean of its divisors is an integer number (48721611).

Almost surely, 2^97443221 is an apocalyptic number.

It is an amenable number.

97443221 is a deficient number, since it is larger than the sum of its proper divisors (1).

97443221 is an equidigital number, since it uses as much as digits as its factorization.

97443221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12096, while the sum is 32.

The square root of 97443221 is about 9871.3332939376. Note that the first 3 decimals coincide. The cubic root of 97443221 is about 460.1688431854.

The spelling of 97443221 in words is "ninety-seven million, four hundred forty-three thousand, two hundred twenty-one".