196809169 has 2 divisors, whose sum is σ = 196809170. Its totient is φ = 196809168.

The previous prime is 196809161. The next prime is 196809181. The reversal of 196809169 is 961908691.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 156550144 + 40259025 = 12512^2 + 6345^2 .

It is a cyclic number.

It is not a de Polignac number, because 196809169 - 2³ = 196809161 is a prime.

It is a super-2 number, since 2×196809169² = 77467698004941122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (196809161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98404584 + 98404585.

It is an arithmetic number, because the mean of its divisors is an integer number (98404585).

Almost surely, 2^196809169 is an apocalyptic number.

It is an amenable number.

196809169 is a deficient number, since it is larger than the sum of its proper divisors (1).

196809169 is an equidigital number, since it uses as much as digits as its factorization.

196809169 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 209952, while the sum is 49.

The square root of 196809169 is about 14028.8691276239. The cubic root of 196809169 is about 581.6768447666.

The spelling of 196809169 in words is "one hundred ninety-six million, eight hundred nine thousand, one hundred sixty-nine".