196656217 has 2 divisors, whose sum is σ = 196656218. Its totient is φ = 196656216.

The previous prime is 196656203. The next prime is 196656223. The reversal of 196656217 is 712656691.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 160883856 + 35772361 = 12684^2 + 5981^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-196656217 is a prime.

It is not a weakly prime, because it can be changed into another prime (196656277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98328108 + 98328109.

It is an arithmetic number, because the mean of its divisors is an integer number (98328109).

Almost surely, 2^196656217 is an apocalyptic number.

It is an amenable number.

196656217 is a deficient number, since it is larger than the sum of its proper divisors (1).

196656217 is an equidigital number, since it uses as much as digits as its factorization.

196656217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 136080, while the sum is 43.

The square root of 196656217 is about 14023.4167377284. The cubic root of 196656217 is about 581.5261205994.

The spelling of 196656217 in words is "one hundred ninety-six million, six hundred fifty-six thousand, two hundred seventeen".