196965221 has 2 divisors, whose sum is σ = 196965222. Its totient is φ = 196965220.

The previous prime is 196965151. The next prime is 196965233. The reversal of 196965221 is 122569691.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 189750625 + 7214596 = 13775^2 + 2686^2 .

It is a cyclic number.

It is not a de Polignac number, because 196965221 - 2¹⁸ = 196703077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (196961221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98482610 + 98482611.

It is an arithmetic number, because the mean of its divisors is an integer number (98482611).

Almost surely, 2^196965221 is an apocalyptic number.

It is an amenable number.

196965221 is a deficient number, since it is larger than the sum of its proper divisors (1).

196965221 is an equidigital number, since it uses as much as digits as its factorization.

196965221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 58320, while the sum is 41.

The square root of 196965221 is about 14034.4298423555. The cubic root of 196965221 is about 581.8305433209.

The spelling of 196965221 in words is "one hundred ninety-six million, nine hundred sixty-five thousand, two hundred twenty-one".