196109189 has 2 divisors, whose sum is σ = 196109190. Its totient is φ = 196109188.

The previous prime is 196109183. The next prime is 196109233. The reversal of 196109189 is 981901691.

It is an a-pointer prime, because the next prime (196109233) can be obtained adding 196109189 to its sum of digits (44).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 164916964 + 31192225 = 12842^2 + 5585^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-196109189 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (196109183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98054594 + 98054595.

It is an arithmetic number, because the mean of its divisors is an integer number (98054595).

Almost surely, 2^196109189 is an apocalyptic number.

It is an amenable number.

196109189 is a deficient number, since it is larger than the sum of its proper divisors (1).

196109189 is an equidigital number, since it uses as much as digits as its factorization.

196109189 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34992, while the sum is 44.

The square root of 196109189 is about 14003.8990641892. The cubic root of 196109189 is about 580.9864199148.

The spelling of 196109189 in words is "one hundred ninety-six million, one hundred nine thousand, one hundred eighty-nine".