196667189 has 2 divisors, whose sum is σ = 196667190. Its totient is φ = 196667188.

The previous prime is 196667087. The next prime is 196667197. The reversal of 196667189 is 981766691.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 193488100 + 3179089 = 13910^2 + 1783^2 .

It is a cyclic number.

It is not a de Polignac number, because 196667189 - 2²⁰ = 195618613 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 196667189.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (196667389) 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, 98333594 + 98333595.

It is an arithmetic number, because the mean of its divisors is an integer number (98333595).

Almost surely, 2^196667189 is an apocalyptic number.

It is an amenable number.

196667189 is a deficient number, since it is larger than the sum of its proper divisors (1).

196667189 is an equidigital number, since it uses as much as digits as its factorization.

196667189 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 979776, while the sum is 53.

The square root of 196667189 is about 14023.8079350795. The cubic root of 196667189 is about 581.5369353875.

The spelling of 196667189 in words is "one hundred ninety-six million, six hundred sixty-seven thousand, one hundred eighty-nine".