197169149 has 2 divisors, whose sum is σ = 197169150. Its totient is φ = 197169148.

The previous prime is 197169143. The next prime is 197169197. The reversal of 197169149 is 941961791.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 193627225 + 3541924 = 13915^2 + 1882^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-197169149 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 (197169143) 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, 98584574 + 98584575.

It is an arithmetic number, because the mean of its divisors is an integer number (98584575).

Almost surely, 2^197169149 is an apocalyptic number.

It is an amenable number.

197169149 is a deficient number, since it is larger than the sum of its proper divisors (1).

197169149 is an equidigital number, since it uses as much as digits as its factorization.

197169149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 122472, while the sum is 47.

The square root of 197169149 is about 14041.6932383527. The cubic root of 197169149 is about 582.0312735367.

The spelling of 197169149 in words is "one hundred ninety-seven million, one hundred sixty-nine thousand, one hundred forty-nine".