97221973 has 2 divisors, whose sum is σ = 97221974. Its totient is φ = 97221972.

The previous prime is 97221941. The next prime is 97222001. The reversal of 97221973 is 37912279.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51294244 + 45927729 = 7162^2 + 6777^2 .

It is a cyclic number.

It is not a de Polignac number, because 97221973 - 2⁵ = 97221941 is a prime.

It is a super-2 number, since 2×97221973² = 18904224068025458, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97227973) 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, 48610986 + 48610987.

It is an arithmetic number, because the mean of its divisors is an integer number (48610987).

Almost surely, 2^97221973 is an apocalyptic number.

It is an amenable number.

97221973 is a deficient number, since it is larger than the sum of its proper divisors (1).

97221973 is an equidigital number, since it uses as much as digits as its factorization.

97221973 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 47628, while the sum is 40.

The square root of 97221973 is about 9860.1203339513. The cubic root of 97221973 is about 459.8203031573.

The spelling of 97221973 in words is "ninety-seven million, two hundred twenty-one thousand, nine hundred seventy-three".