97190221 has 2 divisors, whose sum is σ = 97190222. Its totient is φ = 97190220.

The previous prime is 97190209. The next prime is 97190227. The reversal of 97190221 is 12209179.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 72080100 + 25110121 = 8490^2 + 5011^2 .

It is a cyclic number.

It is not a de Polignac number, because 97190221 - 2⁹ = 97189709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97190227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48595110 + 48595111.

It is an arithmetic number, because the mean of its divisors is an integer number (48595111).

Almost surely, 2^97190221 is an apocalyptic number.

It is an amenable number.

97190221 is a deficient number, since it is larger than the sum of its proper divisors (1).

97190221 is an equidigital number, since it uses as much as digits as its factorization.

97190221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2268, while the sum is 31.

The square root of 97190221 is about 9858.5100801287. The cubic root of 97190221 is about 459.7702397010.

The spelling of 97190221 in words is "ninety-seven million, one hundred ninety thousand, two hundred twenty-one".