196809101 has 2 divisors, whose sum is σ = 196809102. Its totient is φ = 196809100.

The previous prime is 196809097. The next prime is 196809103. The reversal of 196809101 is 101908691.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 159415876 + 37393225 = 12626^2 + 6115^2 .

It is a cyclic number.

It is not a de Polignac number, because 196809101 - 2² = 196809097 is a prime.

Together with 196809103, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (196809103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98404550 + 98404551.

It is an arithmetic number, because the mean of its divisors is an integer number (98404551).

Almost surely, 2^196809101 is an apocalyptic number.

It is an amenable number.

196809101 is a deficient number, since it is larger than the sum of its proper divisors (1).

196809101 is an equidigital number, since it uses as much as digits as its factorization.

196809101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 35.

The square root of 196809101 is about 14028.8667040499. The cubic root of 196809101 is about 581.6767777744.

The spelling of 196809101 in words is "one hundred ninety-six million, eight hundred nine thousand, one hundred one".