196969697 has 2 divisors, whose sum is σ = 196969698. Its totient is φ = 196969696.

The previous prime is 196969651. The next prime is 196969709. The reversal of 196969697 is 796969691.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 192626641 + 4343056 = 13879^2 + 2084^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-196969697 is a prime.

It is not a weakly prime, because it can be changed into another prime (196969607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98484848 + 98484849.

It is an arithmetic number, because the mean of its divisors is an integer number (98484849).

Almost surely, 2^196969697 is an apocalyptic number.

It is an amenable number.

196969697 is a deficient number, since it is larger than the sum of its proper divisors (1).

196969697 is an equidigital number, since it uses as much as digits as its factorization.

196969697 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9920232, while the sum is 62.

The square root of 196969697 is about 14034.5893064243. The cubic root of 196969697 is about 581.8349506198.

The spelling of 196969697 in words is "one hundred ninety-six million, nine hundred sixty-nine thousand, six hundred ninety-seven".