196669901 has 2 divisors, whose sum is σ = 196669902. Its totient is φ = 196669900.

The previous prime is 196669897. The next prime is 196669903. The reversal of 196669901 is 109966691.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 192487876 + 4182025 = 13874^2 + 2045^2 .

It is an emirp because it is prime and its reverse (109966691) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 196669901 - 2² = 196669897 is a prime.

Together with 196669903, 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 (196669903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98334950 + 98334951.

It is an arithmetic number, because the mean of its divisors is an integer number (98334951).

Almost surely, 2^196669901 is an apocalyptic number.

It is an amenable number.

196669901 is a deficient number, since it is larger than the sum of its proper divisors (1).

196669901 is an equidigital number, since it uses as much as digits as its factorization.

196669901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 157464, while the sum is 47.

The square root of 196669901 is about 14023.9046274566. The cubic root of 196669901 is about 581.5396084667.

The spelling of 196669901 in words is "one hundred ninety-six million, six hundred sixty-nine thousand, nine hundred one".